Finding the Fourth Proportional to 72,874, 109,310.98 and 28,469.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,874 : 109,310.98 = 28,469.61 : x
2. Step 2: Convert to fraction form
   72,874/109,310.98 = 28,469.61/x
3. Step 3: Cross multiply
   72,874x = 109,310.98 × 28,469.61
4. Step 4: Simplify right side
   72,874x = 3,112,040,969.32
5. Step 5: Solve for x
   x = 3,112,040,969.32/72,874
6. Step 6: Final answer
   x = 42,704.41