Finding the Fourth Proportional to 8,754.64, 12,081.70 and 4,978.44

Step by Step Solution

1. Step 1: Write the proportion equation
   8,754.64 : 12,081.70 = 4,978.44 : x
2. Step 2: Convert to fraction form
   8,754.64/12,081.70 = 4,978.44/x
3. Step 3: Cross multiply
   8,754.64x = 12,081.70 × 4,978.44
4. Step 4: Simplify right side
   8,754.64x = 60,148,018.55
5. Step 5: Solve for x
   x = 60,148,018.55/8,754.64
6. Step 6: Final answer
   x = 6,870.42