Finding the Fourth Proportional to 72,242.43, 108,345 and 21,631.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,242.43 : 108,345 = 21,631.47 : x
2. Step 2: Convert to fraction form
   72,242.43/108,345 = 21,631.47/x
3. Step 3: Cross multiply
   72,242.43x = 108,345 × 21,631.47
4. Step 4: Simplify right side
   72,242.43x = 2,343,661,617.15
5. Step 5: Solve for x
   x = 2,343,661,617.15/72,242.43
6. Step 6: Final answer
   x = 32,441.62