Finding the Fourth Proportional to 86,442,892.86, 129,673,422.30 and 28,155,109.70

Step by Step Solution

1. Step 1: Write the proportion equation
   86,442,892.86 : 129,673,422.30 = 28,155,109.70 : x
2. Step 2: Convert to fraction form
   86,442,892.86/129,673,422.30 = 28,155,109.70/x
3. Step 3: Cross multiply
   86,442,892.86x = 129,673,422.30 × 28,155,109.70
4. Step 4: Simplify right side
   86,442,892.86x = 3,650,969,429,709,571
5. Step 5: Solve for x
   x = 3,650,969,429,709,571/86,442,892.86
6. Step 6: Final answer
   x = 42,235,622.95