Finding the Third Proportional to 49.39 and 74.78

Step by Step Solution

1. Step 1: Write the proportion equation
   49.39 : 74.78 = 74.78 : x
2. Step 2: Convert to fraction form
   49.39/74.78 = 74.78/x
3. Step 3: Cross multiply
   49.39x = 74.78 × 74.78
4. Step 4: Simplify right side
   49.39x = 5,591.65
5. Step 5: Solve for x
   x = 5,591.65/49.39
6. Step 6: Final answer
   x = 113.20