Finding the Fourth Proportional to 31,780.18, 43,856.60 and 17,440.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,780.18 : 43,856.60 = 17,440.10 : x
2. Step 2: Convert to fraction form
   31,780.18/43,856.60 = 17,440.10/x
3. Step 3: Cross multiply
   31,780.18x = 43,856.60 × 17,440.10
4. Step 4: Simplify right side
   31,780.18x = 764,863,489.66
5. Step 5: Solve for x
   x = 764,863,489.66/31,780.18
6. Step 6: Final answer
   x = 24,067.31