Finding the Fourth Proportional to 72,071.22, 99,462.71 and 40,240.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,071.22 : 99,462.71 = 40,240.12 : x
2. Step 2: Convert to fraction form
   72,071.22/99,462.71 = 40,240.12/x
3. Step 3: Cross multiply
   72,071.22x = 99,462.71 × 40,240.12
4. Step 4: Simplify right side
   72,071.22x = 4,002,391,031.45
5. Step 5: Solve for x
   x = 4,002,391,031.45/72,071.22
6. Step 6: Final answer
   x = 55,533.83