Finding the Fourth Proportional to 21,347.50, 32,020.56 and 9,660.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,347.50 : 32,020.56 = 9,660.71 : x
2. Step 2: Convert to fraction form
   21,347.50/32,020.56 = 9,660.71/x
3. Step 3: Cross multiply
   21,347.50x = 32,020.56 × 9,660.71
4. Step 4: Simplify right side
   21,347.50x = 309,341,295.89
5. Step 5: Solve for x
   x = 309,341,295.89/21,347.50
6. Step 6: Final answer
   x = 14,490.75