Finding the Fourth Proportional to 21,089.92, 31,632.72 and 5,505.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,089.92 : 31,632.72 = 5,505.52 : x
2. Step 2: Convert to fraction form
   21,089.92/31,632.72 = 5,505.52/x
3. Step 3: Cross multiply
   21,089.92x = 31,632.72 × 5,505.52
4. Step 4: Simplify right side
   21,089.92x = 174,154,572.61
5. Step 5: Solve for x
   x = 174,154,572.61/21,089.92
6. Step 6: Final answer
   x = 8,257.72