Finding the Fourth Proportional to 1,178.59, 1,626.50 and 654.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.59 : 1,626.50 = 654.61 : x
2. Step 2: Convert to fraction form
   1,178.59/1,626.50 = 654.61/x
3. Step 3: Cross multiply
   1,178.59x = 1,626.50 × 654.61
4. Step 4: Simplify right side
   1,178.59x = 1,064,720.74
5. Step 5: Solve for x
   x = 1,064,720.74/1,178.59
6. Step 6: Final answer
   x = 903.39