Finding the Fourth Proportional to 8,788.89, 12,128.99 and 5,011.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.89 : 12,128.99 = 5,011.45 : x
2. Step 2: Convert to fraction form
   8,788.89/12,128.99 = 5,011.45/x
3. Step 3: Cross multiply
   8,788.89x = 12,128.99 × 5,011.45
4. Step 4: Simplify right side
   8,788.89x = 60,783,766.29
5. Step 5: Solve for x
   x = 60,783,766.29/8,788.89
6. Step 6: Final answer
   x = 6,915.98