Finding the Fourth Proportional to 31,121.73, 42,934.10 and 19,180.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.73 : 42,934.10 = 19,180.71 : x
2. Step 2: Convert to fraction form
   31,121.73/42,934.10 = 19,180.71/x
3. Step 3: Cross multiply
   31,121.73x = 42,934.10 × 19,180.71
4. Step 4: Simplify right side
   31,121.73x = 823,506,425.31
5. Step 5: Solve for x
   x = 823,506,425.31/31,121.73
6. Step 6: Final answer
   x = 26,460.82