Finding the Fourth Proportional to 1,178.88, 1,626.78 and 654.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.88 : 1,626.78 = 654.88 : x
2. Step 2: Convert to fraction form
   1,178.88/1,626.78 = 654.88/x
3. Step 3: Cross multiply
   1,178.88x = 1,626.78 × 654.88
4. Step 4: Simplify right side
   1,178.88x = 1,065,345.69
5. Step 5: Solve for x
   x = 1,065,345.69/1,178.88
6. Step 6: Final answer
   x = 903.69