Finding the Fourth Proportional to 22,772.54, 31,447.82 and 21,530.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,772.54 : 31,447.82 = 21,530.05 : x
2. Step 2: Convert to fraction form
   22,772.54/31,447.82 = 21,530.05/x
3. Step 3: Cross multiply
   22,772.54x = 31,447.82 × 21,530.05
4. Step 4: Simplify right side
   22,772.54x = 677,073,112.20
5. Step 5: Solve for x
   x = 677,073,112.20/22,772.54
6. Step 6: Final answer
   x = 29,731.99