Finding the Fourth Proportional to 12,957.12, 19,439.04 and 5,560.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.12 : 19,439.04 = 5,560.32 : x
2. Step 2: Convert to fraction form
   12,957.12/19,439.04 = 5,560.32/x
3. Step 3: Cross multiply
   12,957.12x = 19,439.04 × 5,560.32
4. Step 4: Simplify right side
   12,957.12x = 108,087,282.89
5. Step 5: Solve for x
   x = 108,087,282.89/12,957.12
6. Step 6: Final answer
   x = 8,341.92