Finding the Fourth Proportional to 1,146.03, 1,581.50 and 648.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.03 : 1,581.50 = 648.69 : x
2. Step 2: Convert to fraction form
   1,146.03/1,581.50 = 648.69/x
3. Step 3: Cross multiply
   1,146.03x = 1,581.50 × 648.69
4. Step 4: Simplify right side
   1,146.03x = 1,025,899.99
5. Step 5: Solve for x
   x = 1,025,899.99/1,146.03
6. Step 6: Final answer
   x = 895.18