Finding the Third Proportional to 65,722.50 and 142,518

Step by Step Solution

1. Step 1: Write the proportion equation
   65,722.50 : 142,518 = 142,518 : x
2. Step 2: Convert to fraction form
   65,722.50/142,518 = 142,518/x
3. Step 3: Cross multiply
   65,722.50x = 142,518 × 142,518
4. Step 4: Simplify right side
   65,722.50x = 20,311,380,324
5. Step 5: Solve for x
   x = 20,311,380,324/65,722.50
6. Step 6: Final answer
   x = 309,047.59