Finding the Fourth Proportional to 31,565.89, 43,561.97 and 17,420.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,565.89 : 43,561.97 = 17,420.05 : x
2. Step 2: Convert to fraction form
   31,565.89/43,561.97 = 17,420.05/x
3. Step 3: Cross multiply
   31,565.89x = 43,561.97 × 17,420.05
4. Step 4: Simplify right side
   31,565.89x = 758,851,695.50
5. Step 5: Solve for x
   x = 758,851,695.50/31,565.89
6. Step 6: Final answer
   x = 24,040.24