Finding the Fourth Proportional to 1,426.63, 1,964.17 and 1,242.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.63 : 1,964.17 = 1,242.55 : x
2. Step 2: Convert to fraction form
   1,426.63/1,964.17 = 1,242.55/x
3. Step 3: Cross multiply
   1,426.63x = 1,964.17 × 1,242.55
4. Step 4: Simplify right side
   1,426.63x = 2,440,579.43
5. Step 5: Solve for x
   x = 2,440,579.43/1,426.63
6. Step 6: Final answer
   x = 1,710.73