Finding the Fourth Proportional to 1,215.99, 1,678.35 and 744.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.99 : 1,678.35 = 744.27 : x
2. Step 2: Convert to fraction form
   1,215.99/1,678.35 = 744.27/x
3. Step 3: Cross multiply
   1,215.99x = 1,678.35 × 744.27
4. Step 4: Simplify right side
   1,215.99x = 1,249,145.55
5. Step 5: Solve for x
   x = 1,249,145.55/1,215.99
6. Step 6: Final answer
   x = 1,027.27