Finding the Fourth Proportional to 1,499.71, 2,250.54 and 678.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.71 : 2,250.54 = 678.03 : x
2. Step 2: Convert to fraction form
   1,499.71/2,250.54 = 678.03/x
3. Step 3: Cross multiply
   1,499.71x = 2,250.54 × 678.03
4. Step 4: Simplify right side
   1,499.71x = 1,525,918.99
5. Step 5: Solve for x
   x = 1,525,918.99/1,499.71
6. Step 6: Final answer
   x = 1,017.48