Finding the Fourth Proportional to 23,158.19, 31,958.37 and 12,547.79

Step by Step Solution

1. Step 1: Write the proportion equation
   23,158.19 : 31,958.37 = 12,547.79 : x
2. Step 2: Convert to fraction form
   23,158.19/31,958.37 = 12,547.79/x
3. Step 3: Cross multiply
   23,158.19x = 31,958.37 × 12,547.79
4. Step 4: Simplify right side
   23,158.19x = 401,006,755.71
5. Step 5: Solve for x
   x = 401,006,755.71/23,158.19
6. Step 6: Final answer
   x = 17,315.98