Finding the Fourth Proportional to 8,789.68, 12,129.12 and 5,013.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.68 : 12,129.12 = 5,013.24 : x
2. Step 2: Convert to fraction form
   8,789.68/12,129.12 = 5,013.24/x
3. Step 3: Cross multiply
   8,789.68x = 12,129.12 × 5,013.24
4. Step 4: Simplify right side
   8,789.68x = 60,806,189.55
5. Step 5: Solve for x
   x = 60,806,189.55/8,789.68
6. Step 6: Final answer
   x = 6,917.91