Finding the Fourth Proportional to 72,031.57, 99,399.52 and 40,202.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,031.57 : 99,399.52 = 40,202.52 : x
2. Step 2: Convert to fraction form
   72,031.57/99,399.52 = 40,202.52/x
3. Step 3: Cross multiply
   72,031.57x = 99,399.52 × 40,202.52
4. Step 4: Simplify right side
   72,031.57x = 3,996,111,190.79
5. Step 5: Solve for x
   x = 3,996,111,190.79/72,031.57
6. Step 6: Final answer
   x = 55,477.22