Finding the Fourth Proportional to 1,216.17, 1,678.83 and 744.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.17 : 1,678.83 = 744.06 : x
2. Step 2: Convert to fraction form
   1,216.17/1,678.83 = 744.06/x
3. Step 3: Cross multiply
   1,216.17x = 1,678.83 × 744.06
4. Step 4: Simplify right side
   1,216.17x = 1,249,150.25
5. Step 5: Solve for x
   x = 1,249,150.25/1,216.17
6. Step 6: Final answer
   x = 1,027.12