Finding the Fourth Proportional to 1,178.68, 1,626.60 and 654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.68 : 1,626.60 = 654.72 : x
2. Step 2: Convert to fraction form
   1,178.68/1,626.60 = 654.72/x
3. Step 3: Cross multiply
   1,178.68x = 1,626.60 × 654.72
4. Step 4: Simplify right side
   1,178.68x = 1,064,967.55
5. Step 5: Solve for x
   x = 1,064,967.55/1,178.68
6. Step 6: Final answer
   x = 903.53