Finding the Third Proportional to 64,618.50 and 141,238.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,618.50 : 141,238.50 = 141,238.50 : x
2. Step 2: Convert to fraction form
   64,618.50/141,238.50 = 141,238.50/x
3. Step 3: Cross multiply
   64,618.50x = 141,238.50 × 141,238.50
4. Step 4: Simplify right side
   64,618.50x = 19,948,313,882.25
5. Step 5: Solve for x
   x = 19,948,313,882.25/64,618.50
6. Step 6: Final answer
   x = 308,709.02