Finding the Fourth Proportional to 23,157.43, 31,957.28 and 12,547.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,157.43 : 31,957.28 = 12,547.05 : x
2. Step 2: Convert to fraction form
   23,157.43/31,957.28 = 12,547.05/x
3. Step 3: Cross multiply
   23,157.43x = 31,957.28 × 12,547.05
4. Step 4: Simplify right side
   23,157.43x = 400,969,527.29
5. Step 5: Solve for x
   x = 400,969,527.29/23,157.43
6. Step 6: Final answer
   x = 17,314.94