Finding the Fourth Proportional to 9,866.51, 13,614.89 and 5,560.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,866.51 : 13,614.89 = 5,560.30 : x
2. Step 2: Convert to fraction form
   9,866.51/13,614.89 = 5,560.30/x
3. Step 3: Cross multiply
   9,866.51x = 13,614.89 × 5,560.30
4. Step 4: Simplify right side
   9,866.51x = 75,702,872.87
5. Step 5: Solve for x
   x = 75,702,872.87/9,866.51
6. Step 6: Final answer
   x = 7,672.71