Finding the Fourth Proportional to 72,398.71, 99,914.88 and 40,134.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,398.71 : 99,914.88 = 40,134.69 : x
2. Step 2: Convert to fraction form
   72,398.71/99,914.88 = 40,134.69/x
3. Step 3: Cross multiply
   72,398.71x = 99,914.88 × 40,134.69
4. Step 4: Simplify right side
   72,398.71x = 4,010,052,885.69
5. Step 5: Solve for x
   x = 4,010,052,885.69/72,398.71
6. Step 6: Final answer
   x = 55,388.46