Finding the Fourth Proportional to 9,864.33, 13,612.43 and 5,615.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.33 : 13,612.43 = 5,615.07 : x
2. Step 2: Convert to fraction form
   9,864.33/13,612.43 = 5,615.07/x
3. Step 3: Cross multiply
   9,864.33x = 13,612.43 × 5,615.07
4. Step 4: Simplify right side
   9,864.33x = 76,434,668.20
5. Step 5: Solve for x
   x = 76,434,668.20/9,864.33
6. Step 6: Final answer
   x = 7,748.59