Finding the Fourth Proportional to 8,788.60, 12,128.04 and 5,011.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.60 : 12,128.04 = 5,011.48 : x
2. Step 2: Convert to fraction form
   8,788.60/12,128.04 = 5,011.48/x
3. Step 3: Cross multiply
   8,788.60x = 12,128.04 × 5,011.48
4. Step 4: Simplify right side
   8,788.60x = 60,779,429.90
5. Step 5: Solve for x
   x = 60,779,429.90/8,788.60
6. Step 6: Final answer
   x = 6,915.71