Finding the Fourth Proportional to 8,957.32, 12,360.16 and 5,179.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.32 : 12,360.16 = 5,179.88 : x
2. Step 2: Convert to fraction form
   8,957.32/12,360.16 = 5,179.88/x
3. Step 3: Cross multiply
   8,957.32x = 12,360.16 × 5,179.88
4. Step 4: Simplify right side
   8,957.32x = 64,024,145.58
5. Step 5: Solve for x
   x = 64,024,145.58/8,957.32
6. Step 6: Final answer
   x = 7,147.69