Finding the Fourth Proportional to 8,755.54, 12,082.58 and 4,978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,755.54 : 12,082.58 = 4,978.70 : x
2. Step 2: Convert to fraction form
   8,755.54/12,082.58 = 4,978.70/x
3. Step 3: Cross multiply
   8,755.54x = 12,082.58 × 4,978.70
4. Step 4: Simplify right side
   8,755.54x = 60,155,585.95
5. Step 5: Solve for x
   x = 60,155,585.95/8,755.54
6. Step 6: Final answer
   x = 6,870.58