Finding the Third Proportional to 64,488 and 140,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,488 : 140,488.50 = 140,488.50 : x
2. Step 2: Convert to fraction form
   64,488/140,488.50 = 140,488.50/x
3. Step 3: Cross multiply
   64,488x = 140,488.50 × 140,488.50
4. Step 4: Simplify right side
   64,488x = 19,737,018,632.25
5. Step 5: Solve for x
   x = 19,737,018,632.25/64,488
6. Step 6: Final answer
   x = 306,057.23