Finding the Fourth Proportional to 31,124.47, 42,951.70 and 16,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,124.47 : 42,951.70 = 16,977.31 : x
2. Step 2: Convert to fraction form
   31,124.47/42,951.70 = 16,977.31/x
3. Step 3: Cross multiply
   31,124.47x = 42,951.70 × 16,977.31
4. Step 4: Simplify right side
   31,124.47x = 729,204,241.04
5. Step 5: Solve for x
   x = 729,204,241.04/31,124.47
6. Step 6: Final answer
   x = 23,428.65