Finding the Fourth Proportional to 9,921.29, 13,691.63 and 5,614.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.29 : 13,691.63 = 5,614.03 : x
2. Step 2: Convert to fraction form
   9,921.29/13,691.63 = 5,614.03/x
3. Step 3: Cross multiply
   9,921.29x = 13,691.63 × 5,614.03
4. Step 4: Simplify right side
   9,921.29x = 76,865,159.27
5. Step 5: Solve for x
   x = 76,865,159.27/9,921.29
6. Step 6: Final answer
   x = 7,747.50