Finding the Fourth Proportional to 1,426.52, 2,140.42 and 776.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.52 : 2,140.42 = 776.28 : x
2. Step 2: Convert to fraction form
   1,426.52/2,140.42 = 776.28/x
3. Step 3: Cross multiply
   1,426.52x = 2,140.42 × 776.28
4. Step 4: Simplify right side
   1,426.52x = 1,661,565.24
5. Step 5: Solve for x
   x = 1,661,565.24/1,426.52
6. Step 6: Final answer
   x = 1,164.77