Finding the Fourth Proportional to 1,426.55, 2,139.35 and 767.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.55 : 2,139.35 = 767.48 : x
2. Step 2: Convert to fraction form
   1,426.55/2,139.35 = 767.48/x
3. Step 3: Cross multiply
   1,426.55x = 2,139.35 × 767.48
4. Step 4: Simplify right side
   1,426.55x = 1,641,893.80
5. Step 5: Solve for x
   x = 1,641,893.80/1,426.55
6. Step 6: Final answer
   x = 1,150.96