Finding the Third Proportional to 65,074.50 and 142,600.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,074.50 : 142,600.50 = 142,600.50 : x
2. Step 2: Convert to fraction form
   65,074.50/142,600.50 = 142,600.50/x
3. Step 3: Cross multiply
   65,074.50x = 142,600.50 × 142,600.50
4. Step 4: Simplify right side
   65,074.50x = 20,334,902,600.25
5. Step 5: Solve for x
   x = 20,334,902,600.25/65,074.50
6. Step 6: Final answer
   x = 312,486.50