Finding the Fourth Proportional to 31,290.32, 43,181.28 and 17,142.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,290.32 : 43,181.28 = 17,142.32 : x
2. Step 2: Convert to fraction form
   31,290.32/43,181.28 = 17,142.32/x
3. Step 3: Cross multiply
   31,290.32x = 43,181.28 × 17,142.32
4. Step 4: Simplify right side
   31,290.32x = 740,227,319.77
5. Step 5: Solve for x
   x = 740,227,319.77/31,290.32
6. Step 6: Final answer
   x = 23,656.75