Finding the Fourth Proportional to 1,008.92, 1,392.72 and 654.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.92 : 1,392.72 = 654.96 : x
2. Step 2: Convert to fraction form
   1,008.92/1,392.72 = 654.96/x
3. Step 3: Cross multiply
   1,008.92x = 1,392.72 × 654.96
4. Step 4: Simplify right side
   1,008.92x = 912,175.89
5. Step 5: Solve for x
   x = 912,175.89/1,008.92
6. Step 6: Final answer
   x = 904.11