Finding the Fourth Proportional to 1,146.30, 1,581.81 and 648.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.30 : 1,581.81 = 648.99 : x
2. Step 2: Convert to fraction form
   1,146.30/1,581.81 = 648.99/x
3. Step 3: Cross multiply
   1,146.30x = 1,581.81 × 648.99
4. Step 4: Simplify right side
   1,146.30x = 1,026,578.87
5. Step 5: Solve for x
   x = 1,026,578.87/1,146.30
6. Step 6: Final answer
   x = 895.56