Finding the Fourth Proportional to 8,789.15, 12,128.64 and 5,012.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.15 : 12,128.64 = 5,012.46 : x
2. Step 2: Convert to fraction form
   8,789.15/12,128.64 = 5,012.46/x
3. Step 3: Cross multiply
   8,789.15x = 12,128.64 × 5,012.46
4. Step 4: Simplify right side
   8,789.15x = 60,794,322.85
5. Step 5: Solve for x
   x = 60,794,322.85/8,789.15
6. Step 6: Final answer
   x = 6,916.98