Finding the Third Proportional to 99,166.78 and 146,665.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,166.78 : 146,665.69 = 146,665.69 : x
2. Step 2: Convert to fraction form
   99,166.78/146,665.69 = 146,665.69/x
3. Step 3: Cross multiply
   99,166.78x = 146,665.69 × 146,665.69
4. Step 4: Simplify right side
   99,166.78x = 21,510,823,889.85
5. Step 5: Solve for x
   x = 21,510,823,889.85/99,166.78
6. Step 6: Final answer
   x = 216,915.62