Finding the Fourth Proportional to 1,145.84, 1,581.26 and 648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.84 : 1,581.26 = 648.50 : x
2. Step 2: Convert to fraction form
   1,145.84/1,581.26 = 648.50/x
3. Step 3: Cross multiply
   1,145.84x = 1,581.26 × 648.50
4. Step 4: Simplify right side
   1,145.84x = 1,025,435.96
5. Step 5: Solve for x
   x = 1,025,435.96/1,145.84
6. Step 6: Final answer
   x = 894.92