Finding the Fourth Proportional to 22,981.52, 31,648.20 and 21,931.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,981.52 : 31,648.20 = 21,931.76 : x
2. Step 2: Convert to fraction form
   22,981.52/31,648.20 = 21,931.76/x
3. Step 3: Cross multiply
   22,981.52x = 31,648.20 × 21,931.76
4. Step 4: Simplify right side
   22,981.52x = 694,100,726.83
5. Step 5: Solve for x
   x = 694,100,726.83/22,981.52
6. Step 6: Final answer
   x = 30,202.56