Finding the Fourth Proportional to 12,431.88, 17,158.13 and 7,955.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,431.88 : 17,158.13 = 7,955.42 : x
2. Step 2: Convert to fraction form
   12,431.88/17,158.13 = 7,955.42/x
3. Step 3: Cross multiply
   12,431.88x = 17,158.13 × 7,955.42
4. Step 4: Simplify right side
   12,431.88x = 136,500,005.00
5. Step 5: Solve for x
   x = 136,500,005.00/12,431.88
6. Step 6: Final answer
   x = 10,979.84