Finding the Fourth Proportional to 72,242.54, 108,385.63 and 21,643.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,242.54 : 108,385.63 = 21,643.22 : x
2. Step 2: Convert to fraction form
   72,242.54/108,385.63 = 21,643.22/x
3. Step 3: Cross multiply
   72,242.54x = 108,385.63 × 21,643.22
4. Step 4: Simplify right side
   72,242.54x = 2,345,813,438.89
5. Step 5: Solve for x
   x = 2,345,813,438.89/72,242.54
6. Step 6: Final answer
   x = 32,471.36