Finding the Fourth Proportional to 63,688.32, 87,807.24 and 40,986.72

Step by Step Solution

1. Step 1: Write the proportion equation
   63,688.32 : 87,807.24 = 40,986.72 : x
2. Step 2: Convert to fraction form
   63,688.32/87,807.24 = 40,986.72/x
3. Step 3: Cross multiply
   63,688.32x = 87,807.24 × 40,986.72
4. Step 4: Simplify right side
   63,688.32x = 3,598,930,759.85
5. Step 5: Solve for x
   x = 3,598,930,759.85/63,688.32
6. Step 6: Final answer
   x = 56,508.49