Finding the Fourth Proportional to 42,128,766.90, 59,059,899.90 and 42,128,766.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128,766.90 : 59,059,899.90 = 42,128,766.90 : x
2. Step 2: Convert to fraction form
   42,128,766.90/59,059,899.90 = 42,128,766.90/x
3. Step 3: Cross multiply
   42,128,766.90x = 59,059,899.90 × 42,128,766.90
4. Step 4: Simplify right side
   42,128,766.90x = 2,488,120,756,024,433
5. Step 5: Solve for x
   x = 2,488,120,756,024,433/42,128,766.90
6. Step 6: Final answer
   x = 59,059,899.90