Finding the Fourth Proportional to 53,018,139.30, 79,511,462.55 and 20,651,414.10

Step by Step Solution

1. Step 1: Write the proportion equation
   53,018,139.30 : 79,511,462.55 = 20,651,414.10 : x
2. Step 2: Convert to fraction form
   53,018,139.30/79,511,462.55 = 20,651,414.10/x
3. Step 3: Cross multiply
   53,018,139.30x = 79,511,462.55 × 20,651,414.10
4. Step 4: Simplify right side
   53,018,139.30x = 1,642,024,138,816,692
5. Step 5: Solve for x
   x = 1,642,024,138,816,692/53,018,139.30
6. Step 6: Final answer
   x = 30,970,987.68