Finding the Fourth Proportional to 31,213.71, 43,074.92 and 17,066.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,213.71 : 43,074.92 = 17,066.55 : x
2. Step 2: Convert to fraction form
   31,213.71/43,074.92 = 17,066.55/x
3. Step 3: Cross multiply
   31,213.71x = 43,074.92 × 17,066.55
4. Step 4: Simplify right side
   31,213.71x = 735,140,190.59
5. Step 5: Solve for x
   x = 735,140,190.59/31,213.71
6. Step 6: Final answer
   x = 23,551.84