Finding the Fourth Proportional to 1,426.94, 2,140.76 and 842.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.94 : 2,140.76 = 842.42 : x
2. Step 2: Convert to fraction form
   1,426.94/2,140.76 = 842.42/x
3. Step 3: Cross multiply
   1,426.94x = 2,140.76 × 842.42
4. Step 4: Simplify right side
   1,426.94x = 1,803,404.12
5. Step 5: Solve for x
   x = 1,803,404.12/1,426.94
6. Step 6: Final answer
   x = 1,263.83