Finding the Fourth Proportional to 31,182.30, 42,982.38 and 28,608.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,182.30 : 42,982.38 = 28,608.12 : x
2. Step 2: Convert to fraction form
   31,182.30/42,982.38 = 28,608.12/x
3. Step 3: Cross multiply
   31,182.30x = 42,982.38 × 28,608.12
4. Step 4: Simplify right side
   31,182.30x = 1,229,645,084.93
5. Step 5: Solve for x
   x = 1,229,645,084.93/31,182.30
6. Step 6: Final answer
   x = 39,434.07