Finding the Fourth Proportional to 8,788.91, 12,128.33 and 5,254.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.91 : 12,128.33 = 5,254.07 : x
2. Step 2: Convert to fraction form
   8,788.91/12,128.33 = 5,254.07/x
3. Step 3: Cross multiply
   8,788.91x = 12,128.33 × 5,254.07
4. Step 4: Simplify right side
   8,788.91x = 63,723,047.30
5. Step 5: Solve for x
   x = 63,723,047.30/8,788.91
6. Step 6: Final answer
   x = 7,250.40