Finding the Fourth Proportional to 1,401.48, 2,105.70 and 908.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.48 : 2,105.70 = 908.20 : x
2. Step 2: Convert to fraction form
   1,401.48/2,105.70 = 908.20/x
3. Step 3: Cross multiply
   1,401.48x = 2,105.70 × 908.20
4. Step 4: Simplify right side
   1,401.48x = 1,912,396.74
5. Step 5: Solve for x
   x = 1,912,396.74/1,401.48
6. Step 6: Final answer
   x = 1,364.56