Finding the Fourth Proportional to 1,404.30, 2,105.55 and 582.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.30 : 2,105.55 = 582.90 : x
2. Step 2: Convert to fraction form
   1,404.30/2,105.55 = 582.90/x
3. Step 3: Cross multiply
   1,404.30x = 2,105.55 × 582.90
4. Step 4: Simplify right side
   1,404.30x = 1,227,325.10
5. Step 5: Solve for x
   x = 1,227,325.10/1,404.30
6. Step 6: Final answer
   x = 873.98