Finding the Fourth Proportional to 1,426.28, 1,960.86 and 1,417.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.28 : 1,960.86 = 1,417.40 : x
2. Step 2: Convert to fraction form
   1,426.28/1,960.86 = 1,417.40/x
3. Step 3: Cross multiply
   1,426.28x = 1,960.86 × 1,417.40
4. Step 4: Simplify right side
   1,426.28x = 2,779,322.96
5. Step 5: Solve for x
   x = 2,779,322.96/1,426.28
6. Step 6: Final answer
   x = 1,948.65