Finding the Third Proportional to 65,977.50 and 142,215

Step by Step Solution

1. Step 1: Write the proportion equation
   65,977.50 : 142,215 = 142,215 : x
2. Step 2: Convert to fraction form
   65,977.50/142,215 = 142,215/x
3. Step 3: Cross multiply
   65,977.50x = 142,215 × 142,215
4. Step 4: Simplify right side
   65,977.50x = 20,225,106,225
5. Step 5: Solve for x
   x = 20,225,106,225/65,977.50
6. Step 6: Final answer
   x = 306,545.51