Finding the Fourth Proportional to 1,196.54, 1,793.73 and 426.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.54 : 1,793.73 = 426.86 : x
2. Step 2: Convert to fraction form
   1,196.54/1,793.73 = 426.86/x
3. Step 3: Cross multiply
   1,196.54x = 1,793.73 × 426.86
4. Step 4: Simplify right side
   1,196.54x = 765,671.59
5. Step 5: Solve for x
   x = 765,671.59/1,196.54
6. Step 6: Final answer
   x = 639.90