Finding the Fourth Proportional to 1,196.72, 1,795.20 and 427.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.72 : 1,795.20 = 427.04 : x
2. Step 2: Convert to fraction form
   1,196.72/1,795.20 = 427.04/x
3. Step 3: Cross multiply
   1,196.72x = 1,795.20 × 427.04
4. Step 4: Simplify right side
   1,196.72x = 766,622.21
5. Step 5: Solve for x
   x = 766,622.21/1,196.72
6. Step 6: Final answer
   x = 640.60