Finding the Fourth Proportional to 23,156.16, 31,955.49 and 12,545.70

Step by Step Solution

1. Step 1: Write the proportion equation
   23,156.16 : 31,955.49 = 12,545.70 : x
2. Step 2: Convert to fraction form
   23,156.16/31,955.49 = 12,545.70/x
3. Step 3: Cross multiply
   23,156.16x = 31,955.49 × 12,545.70
4. Step 4: Simplify right side
   23,156.16x = 400,903,990.89
5. Step 5: Solve for x
   x = 400,903,990.89/23,156.16
6. Step 6: Final answer
   x = 17,313.06