Finding the Fourth Proportional to 31,113.06, 42,935.85 and 16,965.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,113.06 : 42,935.85 = 16,965.60 : x
2. Step 2: Convert to fraction form
   31,113.06/42,935.85 = 16,965.60/x
3. Step 3: Cross multiply
   31,113.06x = 42,935.85 × 16,965.60
4. Step 4: Simplify right side
   31,113.06x = 728,432,456.76
5. Step 5: Solve for x
   x = 728,432,456.76/31,113.06
6. Step 6: Final answer
   x = 23,412.43