Finding the Fourth Proportional to 23,181.35, 31,990.28 and 12,571.02

Step by Step Solution

1. Step 1: Write the proportion equation
   23,181.35 : 31,990.28 = 12,571.02 : x
2. Step 2: Convert to fraction form
   23,181.35/31,990.28 = 12,571.02/x
3. Step 3: Cross multiply
   23,181.35x = 31,990.28 × 12,571.02
4. Step 4: Simplify right side
   23,181.35x = 402,150,386.83
5. Step 5: Solve for x
   x = 402,150,386.83/23,181.35
6. Step 6: Final answer
   x = 17,348.02