Finding the Fourth Proportional to 9,864.32, 13,612.84 and 5,615.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.32 : 13,612.84 = 5,615.17 : x
2. Step 2: Convert to fraction form
   9,864.32/13,612.84 = 5,615.17/x
3. Step 3: Cross multiply
   9,864.32x = 13,612.84 × 5,615.17
4. Step 4: Simplify right side
   9,864.32x = 76,438,362.71
5. Step 5: Solve for x
   x = 76,438,362.71/9,864.32
6. Step 6: Final answer
   x = 7,748.98