Finding the Third Proportional to 172,988.50 and 243,500

Step by Step Solution

1. Step 1: Write the proportion equation
   172,988.50 : 243,500 = 243,500 : x
2. Step 2: Convert to fraction form
   172,988.50/243,500 = 243,500/x
3. Step 3: Cross multiply
   172,988.50x = 243,500 × 243,500
4. Step 4: Simplify right side
   172,988.50x = 59,292,250,000
5. Step 5: Solve for x
   x = 59,292,250,000/172,988.50
6. Step 6: Final answer
   x = 342,752.55