Finding the Fourth Proportional to 72,452.58, 99,978.81 and 40,617.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,452.58 : 99,978.81 = 40,617.15 : x
2. Step 2: Convert to fraction form
   72,452.58/99,978.81 = 40,617.15/x
3. Step 3: Cross multiply
   72,452.58x = 99,978.81 × 40,617.15
4. Step 4: Simplify right side
   72,452.58x = 4,060,854,322.59
5. Step 5: Solve for x
   x = 4,060,854,322.59/72,452.58
6. Step 6: Final answer
   x = 56,048.44