Finding the Fourth Proportional to 1,396.52, 2,082.59 and 1,223.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.52 : 2,082.59 = 1,223.99 : x
2. Step 2: Convert to fraction form
   1,396.52/2,082.59 = 1,223.99/x
3. Step 3: Cross multiply
   1,396.52x = 2,082.59 × 1,223.99
4. Step 4: Simplify right side
   1,396.52x = 2,549,069.33
5. Step 5: Solve for x
   x = 2,549,069.33/1,396.52
6. Step 6: Final answer
   x = 1,825.30