Finding the Fourth Proportional to 5,124.80, 7,686.15 and 1,426.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,124.80 : 7,686.15 = 1,426.10 : x
2. Step 2: Convert to fraction form
   5,124.80/7,686.15 = 1,426.10/x
3. Step 3: Cross multiply
   5,124.80x = 7,686.15 × 1,426.10
4. Step 4: Simplify right side
   5,124.80x = 10,961,218.52
5. Step 5: Solve for x
   x = 10,961,218.52/5,124.80
6. Step 6: Final answer
   x = 2,138.86