Finding the Fourth Proportional to 31,117.71, 42,941.97 and 16,970.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.71 : 42,941.97 = 16,970.25 : x
2. Step 2: Convert to fraction form
   31,117.71/42,941.97 = 16,970.25/x
3. Step 3: Cross multiply
   31,117.71x = 42,941.97 × 16,970.25
4. Step 4: Simplify right side
   31,117.71x = 728,735,966.39
5. Step 5: Solve for x
   x = 728,735,966.39/31,117.71
6. Step 6: Final answer
   x = 23,418.69