Finding the Fourth Proportional to 28,320,213,920.10, 42,398,691,542.55 and 28,320,213,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,320,213,920.10 : 42,398,691,542.55 = 28,320,213,920.10 : x
2. Step 2: Convert to fraction form
   28,320,213,920.10/42,398,691,542.55 = 28,320,213,920.10/x
3. Step 3: Cross multiply
   28,320,213,920.10x = 42,398,691,542.55 × 28,320,213,920.10
4. Step 4: Simplify right side
   28,320,213,920.10x = 1,200,740,014,417,350,754,304
5. Step 5: Solve for x
   x = 1,200,740,014,417,350,754,304/28,320,213,920.10
6. Step 6: Final answer
   x = 42,398,691,542.55