Finding the Fourth Proportional to 31,035.49, 42,828.78 and 16,888.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,035.49 : 42,828.78 = 16,888.39 : x
2. Step 2: Convert to fraction form
   31,035.49/42,828.78 = 16,888.39/x
3. Step 3: Cross multiply
   31,035.49x = 42,828.78 × 16,888.39
4. Step 4: Simplify right side
   31,035.49x = 723,309,139.86
5. Step 5: Solve for x
   x = 723,309,139.86/31,035.49
6. Step 6: Final answer
   x = 23,305.87