Finding the Fourth Proportional to 1,194.66, 1,648.71 and 663.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,194.66 : 1,648.71 = 663.57 : x
2. Step 2: Convert to fraction form
   1,194.66/1,648.71 = 663.57/x
3. Step 3: Cross multiply
   1,194.66x = 1,648.71 × 663.57
4. Step 4: Simplify right side
   1,194.66x = 1,094,034.49
5. Step 5: Solve for x
   x = 1,094,034.49/1,194.66
6. Step 6: Final answer
   x = 915.77