Finding the Fourth Proportional to 8,957.06, 12,361.50 and 4,978.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.06 : 12,361.50 = 4,978.07 : x
2. Step 2: Convert to fraction form
   8,957.06/12,361.50 = 4,978.07/x
3. Step 3: Cross multiply
   8,957.06x = 12,361.50 × 4,978.07
4. Step 4: Simplify right side
   8,957.06x = 61,536,350.50
5. Step 5: Solve for x
   x = 61,536,350.50/8,957.06
6. Step 6: Final answer
   x = 6,870.15