Finding the Fourth Proportional to 23,181.34, 31,990.25 and 12,571

Step by Step Solution

1. Step 1: Write the proportion equation
   23,181.34 : 31,990.25 = 12,571 : x
2. Step 2: Convert to fraction form
   23,181.34/31,990.25 = 12,571/x
3. Step 3: Cross multiply
   23,181.34x = 31,990.25 × 12,571
4. Step 4: Simplify right side
   23,181.34x = 402,149,432.75
5. Step 5: Solve for x
   x = 402,149,432.75/23,181.34
6. Step 6: Final answer
   x = 17,347.98