Finding the Fourth Proportional to 12,957.12, 17,878.98 and 7,291.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,957.12 : 17,878.98 = 7,291.08 : x
2. Step 2: Convert to fraction form
   12,957.12/17,878.98 = 7,291.08/x
3. Step 3: Cross multiply
   12,957.12x = 17,878.98 × 7,291.08
4. Step 4: Simplify right side
   12,957.12x = 130,357,073.50
5. Step 5: Solve for x
   x = 130,357,073.50/12,957.12
6. Step 6: Final answer
   x = 10,060.65