Finding the Fourth Proportional to 1,146.35, 1,581.94 and 648.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.35 : 1,581.94 = 648.98 : x
2. Step 2: Convert to fraction form
   1,146.35/1,581.94 = 648.98/x
3. Step 3: Cross multiply
   1,146.35x = 1,581.94 × 648.98
4. Step 4: Simplify right side
   1,146.35x = 1,026,646.25
5. Step 5: Solve for x
   x = 1,026,646.25/1,146.35
6. Step 6: Final answer
   x = 895.58