Finding the Fourth Proportional to 9,864.55, 13,611.85 and 5,616.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.55 : 13,611.85 = 5,616.16 : x
2. Step 2: Convert to fraction form
   9,864.55/13,611.85 = 5,616.16/x
3. Step 3: Cross multiply
   9,864.55x = 13,611.85 × 5,616.16
4. Step 4: Simplify right side
   9,864.55x = 76,446,327.50
5. Step 5: Solve for x
   x = 76,446,327.50/9,864.55
6. Step 6: Final answer
   x = 7,749.60