Finding the Fourth Proportional to 8,957.56, 12,362.20 and 4,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.56 : 12,362.20 = 4,978.56 : x
2. Step 2: Convert to fraction form
   8,957.56/12,362.20 = 4,978.56/x
3. Step 3: Cross multiply
   8,957.56x = 12,362.20 × 4,978.56
4. Step 4: Simplify right side
   8,957.56x = 61,545,954.43
5. Step 5: Solve for x
   x = 61,545,954.43/8,957.56
6. Step 6: Final answer
   x = 6,870.84