Finding the Third Proportional to 65,854.50 and 142,238.63

Step by Step Solution

1. Step 1: Write the proportion equation
   65,854.50 : 142,238.63 = 142,238.63 : x
2. Step 2: Convert to fraction form
   65,854.50/142,238.63 = 142,238.63/x
3. Step 3: Cross multiply
   65,854.50x = 142,238.63 × 142,238.63
4. Step 4: Simplify right side
   65,854.50x = 20,231,826,441.89
5. Step 5: Solve for x
   x = 20,231,826,441.89/65,854.50
6. Step 6: Final answer
   x = 307,220.11