Finding the Third Proportional to 40,717.69 and 77,258.81

Step by Step Solution

1. Step 1: Write the proportion equation
   40,717.69 : 77,258.81 = 77,258.81 : x
2. Step 2: Convert to fraction form
   40,717.69/77,258.81 = 77,258.81/x
3. Step 3: Cross multiply
   40,717.69x = 77,258.81 × 77,258.81
4. Step 4: Simplify right side
   40,717.69x = 5,968,924,108.91
5. Step 5: Solve for x
   x = 5,968,924,108.91/40,717.69
6. Step 6: Final answer
   x = 146,592.91