Finding the Third Proportional to 66,601.50 and 142,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,601.50 : 142,648.50 = 142,648.50 : x
2. Step 2: Convert to fraction form
   66,601.50/142,648.50 = 142,648.50/x
3. Step 3: Cross multiply
   66,601.50x = 142,648.50 × 142,648.50
4. Step 4: Simplify right side
   66,601.50x = 20,348,594,552.25
5. Step 5: Solve for x
   x = 20,348,594,552.25/66,601.50
6. Step 6: Final answer
   x = 305,527.57