Finding the Fourth Proportional to 1,178.72, 1,626.56 and 654.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.72 : 1,626.56 = 654.74 : x
2. Step 2: Convert to fraction form
   1,178.72/1,626.56 = 654.74/x
3. Step 3: Cross multiply
   1,178.72x = 1,626.56 × 654.74
4. Step 4: Simplify right side
   1,178.72x = 1,064,973.89
5. Step 5: Solve for x
   x = 1,064,973.89/1,178.72
6. Step 6: Final answer
   x = 903.50