Finding the Fourth Proportional to 1,196.56, 1,795.56 and 426.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.56 : 1,795.56 = 426.96 : x
2. Step 2: Convert to fraction form
   1,196.56/1,795.56 = 426.96/x
3. Step 3: Cross multiply
   1,196.56x = 1,795.56 × 426.96
4. Step 4: Simplify right side
   1,196.56x = 766,632.30
5. Step 5: Solve for x
   x = 766,632.30/1,196.56
6. Step 6: Final answer
   x = 640.70