Finding the Fourth Proportional to 8,758.76, 12,086.89 and 4,980.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,758.76 : 12,086.89 = 4,980.11 : x
2. Step 2: Convert to fraction form
   8,758.76/12,086.89 = 4,980.11/x
3. Step 3: Cross multiply
   8,758.76x = 12,086.89 × 4,980.11
4. Step 4: Simplify right side
   8,758.76x = 60,193,968.87
5. Step 5: Solve for x
   x = 60,193,968.87/8,758.76
6. Step 6: Final answer
   x = 6,872.43