Finding the Fourth Proportional to 1,401.90, 2,104.20 and 709.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.90 : 2,104.20 = 709.35 : x
2. Step 2: Convert to fraction form
   1,401.90/2,104.20 = 709.35/x
3. Step 3: Cross multiply
   1,401.90x = 2,104.20 × 709.35
4. Step 4: Simplify right side
   1,401.90x = 1,492,614.27
5. Step 5: Solve for x
   x = 1,492,614.27/1,401.90
6. Step 6: Final answer
   x = 1,064.71