Finding the Fourth Proportional to 72,088.02, 99,480.42 and 40,257.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,088.02 : 99,480.42 = 40,257.36 : x
2. Step 2: Convert to fraction form
   72,088.02/99,480.42 = 40,257.36/x
3. Step 3: Cross multiply
   72,088.02x = 99,480.42 × 40,257.36
4. Step 4: Simplify right side
   72,088.02x = 4,004,819,080.89
5. Step 5: Solve for x
   x = 4,004,819,080.89/72,088.02
6. Step 6: Final answer
   x = 55,554.57