Finding the Fourth Proportional to 31,790.96, 43,871.10 and 17,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,790.96 : 43,871.10 = 17,643.50 : x
2. Step 2: Convert to fraction form
   31,790.96/43,871.10 = 17,643.50/x
3. Step 3: Cross multiply
   31,790.96x = 43,871.10 × 17,643.50
4. Step 4: Simplify right side
   31,790.96x = 774,039,752.85
5. Step 5: Solve for x
   x = 774,039,752.85/31,790.96
6. Step 6: Final answer
   x = 24,347.79