Finding the Fourth Proportional to 9,863.84, 13,612.32 and 5,615.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,863.84 : 13,612.32 = 5,615.12 : x
2. Step 2: Convert to fraction form
   9,863.84/13,612.32 = 5,615.12/x
3. Step 3: Cross multiply
   9,863.84x = 13,612.32 × 5,615.12
4. Step 4: Simplify right side
   9,863.84x = 76,434,810.28
5. Step 5: Solve for x
   x = 76,434,810.28/9,863.84
6. Step 6: Final answer
   x = 7,748.99