Finding the Fourth Proportional to 1,499.47, 2,249.92 and 678.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.47 : 2,249.92 = 678.00 : x
2. Step 2: Convert to fraction form
   1,499.47/2,249.92 = 678.00/x
3. Step 3: Cross multiply
   1,499.47x = 2,249.92 × 678.00
4. Step 4: Simplify right side
   1,499.47x = 1,525,434.51
5. Step 5: Solve for x
   x = 1,525,434.51/1,499.47
6. Step 6: Final answer
   x = 1,017.32