Finding the Fourth Proportional to 8,957.37, 12,361.27 and 4,978.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.37 : 12,361.27 = 4,978.55 : x
2. Step 2: Convert to fraction form
   8,957.37/12,361.27 = 4,978.55/x
3. Step 3: Cross multiply
   8,957.37x = 12,361.27 × 4,978.55
4. Step 4: Simplify right side
   8,957.37x = 61,541,200.76
5. Step 5: Solve for x
   x = 61,541,200.76/8,957.37
6. Step 6: Final answer
   x = 6,870.45