Finding the Fourth Proportional to 31,123.28, 42,950.16 and 16,976.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.28 : 42,950.16 = 16,976.16 : x
2. Step 2: Convert to fraction form
   31,123.28/42,950.16 = 16,976.16/x
3. Step 3: Cross multiply
   31,123.28x = 42,950.16 × 16,976.16
4. Step 4: Simplify right side
   31,123.28x = 729,128,788.19
5. Step 5: Solve for x
   x = 729,128,788.19/31,123.28
6. Step 6: Final answer
   x = 23,427.12