Finding the Fourth Proportional to 8,957.39, 12,361.11 and 4,978.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.39 : 12,361.11 = 4,978.42 : x
2. Step 2: Convert to fraction form
   8,957.39/12,361.11 = 4,978.42/x
3. Step 3: Cross multiply
   8,957.39x = 12,361.11 × 4,978.42
4. Step 4: Simplify right side
   8,957.39x = 61,538,766.34
5. Step 5: Solve for x
   x = 61,538,766.34/8,957.39
6. Step 6: Final answer
   x = 6,870.17