Finding the Fourth Proportional to 1,499.49, 2,249.37 and 678.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.49 : 2,249.37 = 678.24 : x
2. Step 2: Convert to fraction form
   1,499.49/2,249.37 = 678.24/x
3. Step 3: Cross multiply
   1,499.49x = 2,249.37 × 678.24
4. Step 4: Simplify right side
   1,499.49x = 1,525,612.71
5. Step 5: Solve for x
   x = 1,525,612.71/1,499.49
6. Step 6: Final answer
   x = 1,017.42