Finding the Fourth Proportional to 1,078.02, 1,487.52 and 612.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.02 : 1,487.52 = 612.27 : x
2. Step 2: Convert to fraction form
   1,078.02/1,487.52 = 612.27/x
3. Step 3: Cross multiply
   1,078.02x = 1,487.52 × 612.27
4. Step 4: Simplify right side
   1,078.02x = 910,763.87
5. Step 5: Solve for x
   x = 910,763.87/1,078.02
6. Step 6: Final answer
   x = 844.85