Finding the Fourth Proportional to 31,092.69, 42,907.89 and 16,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,092.69 : 42,907.89 = 16,945.50 : x
2. Step 2: Convert to fraction form
   31,092.69/42,907.89 = 16,945.50/x
3. Step 3: Cross multiply
   31,092.69x = 42,907.89 × 16,945.50
4. Step 4: Simplify right side
   31,092.69x = 727,095,650.00
5. Step 5: Solve for x
   x = 727,095,650.00/31,092.69
6. Step 6: Final answer
   x = 23,384.78