Finding the Fourth Proportional to 8,787.76, 12,128.52 and 5,011

Step by Step Solution

1. Step 1: Write the proportion equation
   8,787.76 : 12,128.52 = 5,011 : x
2. Step 2: Convert to fraction form
   8,787.76/12,128.52 = 5,011/x
3. Step 3: Cross multiply
   8,787.76x = 12,128.52 × 5,011
4. Step 4: Simplify right side
   8,787.76x = 60,776,013.72
5. Step 5: Solve for x
   x = 60,776,013.72/8,787.76
6. Step 6: Final answer
   x = 6,915.98