Finding the Fourth Proportional to 72,018.32, 99,385.25 and 40,187.41

Step by Step Solution

1. Step 1: Write the proportion equation
   72,018.32 : 99,385.25 = 40,187.41 : x
2. Step 2: Convert to fraction form
   72,018.32/99,385.25 = 40,187.41/x
3. Step 3: Cross multiply
   72,018.32x = 99,385.25 × 40,187.41
4. Step 4: Simplify right side
   72,018.32x = 3,994,035,340.30
5. Step 5: Solve for x
   x = 3,994,035,340.30/72,018.32
6. Step 6: Final answer
   x = 55,458.61