Finding the Fourth Proportional to 31,092.79, 42,907.97 and 16,945.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,092.79 : 42,907.97 = 16,945.60 : x
2. Step 2: Convert to fraction form
   31,092.79/42,907.97 = 16,945.60/x
3. Step 3: Cross multiply
   31,092.79x = 42,907.97 × 16,945.60
4. Step 4: Simplify right side
   31,092.79x = 727,100,997.16
5. Step 5: Solve for x
   x = 727,100,997.16/31,092.79
6. Step 6: Final answer
   x = 23,384.88