Finding the Fourth Proportional to 31,112.82, 42,934.76 and 17,685.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.82 : 42,934.76 = 17,685.54 : x
2. Step 2: Convert to fraction form
   31,112.82/42,934.76 = 17,685.54/x
3. Step 3: Cross multiply
   31,112.82x = 42,934.76 × 17,685.54
4. Step 4: Simplify right side
   31,112.82x = 759,324,415.37
5. Step 5: Solve for x
   x = 759,324,415.37/31,112.82
6. Step 6: Final answer
   x = 24,405.52