Finding the Fourth Proportional to 1,401.57, 2,092.16 and 1,286.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.57 : 2,092.16 = 1,286.01 : x
2. Step 2: Convert to fraction form
   1,401.57/2,092.16 = 1,286.01/x
3. Step 3: Cross multiply
   1,401.57x = 2,092.16 × 1,286.01
4. Step 4: Simplify right side
   1,401.57x = 2,690,541.90
5. Step 5: Solve for x
   x = 2,690,541.90/1,401.57
6. Step 6: Final answer
   x = 1,919.66