Finding the Fourth Proportional to 1,178.89, 1,626.79 and 654.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.89 : 1,626.79 = 654.91 : x
2. Step 2: Convert to fraction form
   1,178.89/1,626.79 = 654.91/x
3. Step 3: Cross multiply
   1,178.89x = 1,626.79 × 654.91
4. Step 4: Simplify right side
   1,178.89x = 1,065,401.04
5. Step 5: Solve for x
   x = 1,065,401.04/1,178.89
6. Step 6: Final answer
   x = 903.73