Finding the Fourth Proportional to 23,181.42, 31,990.20 and 12,571.08

Step by Step Solution

1. Step 1: Write the proportion equation
   23,181.42 : 31,990.20 = 12,571.08 : x
2. Step 2: Convert to fraction form
   23,181.42/31,990.20 = 12,571.08/x
3. Step 3: Cross multiply
   23,181.42x = 31,990.20 × 12,571.08
4. Step 4: Simplify right side
   23,181.42x = 402,151,363.42
5. Step 5: Solve for x
   x = 402,151,363.42/23,181.42
6. Step 6: Final answer
   x = 17,348.00