Finding the Fourth Proportional to 22,840.62, 31,484.32 and 21,007.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,840.62 : 31,484.32 = 21,007.72 : x
2. Step 2: Convert to fraction form
   22,840.62/31,484.32 = 21,007.72/x
3. Step 3: Cross multiply
   22,840.62x = 31,484.32 × 21,007.72
4. Step 4: Simplify right side
   22,840.62x = 661,413,778.95
5. Step 5: Solve for x
   x = 661,413,778.95/22,840.62
6. Step 6: Final answer
   x = 28,957.79