Finding the Fourth Proportional to 130.78, 196.18 and 52.69

Step by Step Solution

1. Step 1: Write the proportion equation
   130.78 : 196.18 = 52.69 : x
2. Step 2: Convert to fraction form
   130.78/196.18 = 52.69/x
3. Step 3: Cross multiply
   130.78x = 196.18 × 52.69
4. Step 4: Simplify right side
   130.78x = 10,336.72
5. Step 5: Solve for x
   x = 10,336.72/130.78
6. Step 6: Final answer
   x = 79.04