Finding the Fourth Proportional to 31,121.10, 42,947.01 and 16,973.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.10 : 42,947.01 = 16,973.82 : x
2. Step 2: Convert to fraction form
   31,121.10/42,947.01 = 16,973.82/x
3. Step 3: Cross multiply
   31,121.10x = 42,947.01 × 16,973.82
4. Step 4: Simplify right side
   31,121.10x = 728,974,817.28
5. Step 5: Solve for x
   x = 728,974,817.28/31,121.10
6. Step 6: Final answer
   x = 23,423.81