Finding the Fourth Proportional to 23,158.05, 31,958.07 and 12,547.68

Step by Step Solution

1. Step 1: Write the proportion equation
   23,158.05 : 31,958.07 = 12,547.68 : x
2. Step 2: Convert to fraction form
   23,158.05/31,958.07 = 12,547.68/x
3. Step 3: Cross multiply
   23,158.05x = 31,958.07 × 12,547.68
4. Step 4: Simplify right side
   23,158.05x = 400,999,773.82
5. Step 5: Solve for x
   x = 400,999,773.82/23,158.05
6. Step 6: Final answer
   x = 17,315.78