Finding the Fourth Proportional to 28,426.80, 42,391.50 and 26,874

Step by Step Solution

1. Step 1: Write the proportion equation
   28,426.80 : 42,391.50 = 26,874 : x
2. Step 2: Convert to fraction form
   28,426.80/42,391.50 = 26,874/x
3. Step 3: Cross multiply
   28,426.80x = 42,391.50 × 26,874
4. Step 4: Simplify right side
   28,426.80x = 1,139,229,171
5. Step 5: Solve for x
   x = 1,139,229,171/28,426.80
6. Step 6: Final answer
   x = 40,075.89