Finding the Fourth Proportional to 1,499.30, 2,249.67 and 609.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.30 : 2,249.67 = 609.80 : x
2. Step 2: Convert to fraction form
   1,499.30/2,249.67 = 609.80/x
3. Step 3: Cross multiply
   1,499.30x = 2,249.67 × 609.80
4. Step 4: Simplify right side
   1,499.30x = 1,371,837.52
5. Step 5: Solve for x
   x = 1,371,837.52/1,499.30
6. Step 6: Final answer
   x = 914.99