Finding the Fourth Proportional to 31,121.84, 42,951.77 and 17,695.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.84 : 42,951.77 = 17,695.10 : x
2. Step 2: Convert to fraction form
   31,121.84/42,951.77 = 17,695.10/x
3. Step 3: Cross multiply
   31,121.84x = 42,951.77 × 17,695.10
4. Step 4: Simplify right side
   31,121.84x = 760,035,562.09
5. Step 5: Solve for x
   x = 760,035,562.09/31,121.84
6. Step 6: Final answer
   x = 24,421.30