Finding the Fourth Proportional to 23,181.32, 31,990.23 and 12,570.96

Step by Step Solution

1. Step 1: Write the proportion equation
   23,181.32 : 31,990.23 = 12,570.96 : x
2. Step 2: Convert to fraction form
   23,181.32/31,990.23 = 12,570.96/x
3. Step 3: Cross multiply
   23,181.32x = 31,990.23 × 12,570.96
4. Step 4: Simplify right side
   23,181.32x = 402,147,901.72
5. Step 5: Solve for x
   x = 402,147,901.72/23,181.32
6. Step 6: Final answer
   x = 17,347.93