Finding the Fourth Proportional to 8,753.84, 12,080.78 and 5,615.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,753.84 : 12,080.78 = 5,615.36 : x
2. Step 2: Convert to fraction form
   8,753.84/12,080.78 = 5,615.36/x
3. Step 3: Cross multiply
   8,753.84x = 12,080.78 × 5,615.36
4. Step 4: Simplify right side
   8,753.84x = 67,837,840.30
5. Step 5: Solve for x
   x = 67,837,840.30/8,753.84
6. Step 6: Final answer
   x = 7,749.50