Finding the Fourth Proportional to 31,122.47, 42,948.94 and 16,975.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,122.47 : 42,948.94 = 16,975.31 : x
2. Step 2: Convert to fraction form
   31,122.47/42,948.94 = 16,975.31/x
3. Step 3: Cross multiply
   31,122.47x = 42,948.94 × 16,975.31
4. Step 4: Simplify right side
   31,122.47x = 729,071,485.79
5. Step 5: Solve for x
   x = 729,071,485.79/31,122.47
6. Step 6: Final answer
   x = 23,425.89