Finding the Third Proportional to 69.47 and 151.78

Step by Step Solution

1. Step 1: Write the proportion equation
   69.47 : 151.78 = 151.78 : x
2. Step 2: Convert to fraction form
   69.47/151.78 = 151.78/x
3. Step 3: Cross multiply
   69.47x = 151.78 × 151.78
4. Step 4: Simplify right side
   69.47x = 23,037.55
5. Step 5: Solve for x
   x = 23,037.55/69.47
6. Step 6: Final answer
   x = 331.62