Finding the Fourth Proportional to 31,123.47, 42,950.38 and 16,976.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.47 : 42,950.38 = 16,976.31 : x
2. Step 2: Convert to fraction form
   31,123.47/42,950.38 = 16,976.31/x
3. Step 3: Cross multiply
   31,123.47x = 42,950.38 × 16,976.31
4. Step 4: Simplify right side
   31,123.47x = 729,138,965.50
5. Step 5: Solve for x
   x = 729,138,965.50/31,123.47
6. Step 6: Final answer
   x = 23,427.30