Finding the Fourth Proportional to 61,879,680.88, 85,335,425.98 and 40,648,978.37

Step by Step Solution

1. Step 1: Write the proportion equation
   61,879,680.88 : 85,335,425.98 = 40,648,978.37 : x
2. Step 2: Convert to fraction form
   61,879,680.88/85,335,425.98 = 40,648,978.37/x
3. Step 3: Cross multiply
   61,879,680.88x = 85,335,425.98 × 40,648,978.37
4. Step 4: Simplify right side
   61,879,680.88x = 3,468,797,884,967,472.50
5. Step 5: Solve for x
   x = 3,468,797,884,967,472.50/61,879,680.88
6. Step 6: Final answer
   x = 56,057,139.21