Finding the Fourth Proportional to 1,178.80, 1,626.79 and 654.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.80 : 1,626.79 = 654.83 : x
2. Step 2: Convert to fraction form
   1,178.80/1,626.79 = 654.83/x
3. Step 3: Cross multiply
   1,178.80x = 1,626.79 × 654.83
4. Step 4: Simplify right side
   1,178.80x = 1,065,270.90
5. Step 5: Solve for x
   x = 1,065,270.90/1,178.80
6. Step 6: Final answer
   x = 903.69