Finding the Fourth Proportional to 8,757.76, 12,086.72 and 4,877.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,757.76 : 12,086.72 = 4,877.56 : x
2. Step 2: Convert to fraction form
   8,757.76/12,086.72 = 4,877.56/x
3. Step 3: Cross multiply
   8,757.76x = 12,086.72 × 4,877.56
4. Step 4: Simplify right side
   8,757.76x = 58,953,702.00
5. Step 5: Solve for x
   x = 58,953,702.00/8,757.76
6. Step 6: Final answer
   x = 6,731.60