Finding the Fourth Proportional to 1,088.94, 1,630.17 and 654.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.94 : 1,630.17 = 654.78 : x
2. Step 2: Convert to fraction form
   1,088.94/1,630.17 = 654.78/x
3. Step 3: Cross multiply
   1,088.94x = 1,630.17 × 654.78
4. Step 4: Simplify right side
   1,088.94x = 1,067,402.71
5. Step 5: Solve for x
   x = 1,067,402.71/1,088.94
6. Step 6: Final answer
   x = 980.22