Finding the Fourth Proportional to 9,866.55, 13,614.61 and 5,618.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,866.55 : 13,614.61 = 5,618.16 : x
2. Step 2: Convert to fraction form
   9,866.55/13,614.61 = 5,618.16/x
3. Step 3: Cross multiply
   9,866.55x = 13,614.61 × 5,618.16
4. Step 4: Simplify right side
   9,866.55x = 76,489,057.32
5. Step 5: Solve for x
   x = 76,489,057.32/9,866.55
6. Step 6: Final answer
   x = 7,752.36