Finding the Third Proportional to 115,819.50 and 243,789

Step by Step Solution

1. Step 1: Write the proportion equation
   115,819.50 : 243,789 = 243,789 : x
2. Step 2: Convert to fraction form
   115,819.50/243,789 = 243,789/x
3. Step 3: Cross multiply
   115,819.50x = 243,789 × 243,789
4. Step 4: Simplify right side
   115,819.50x = 59,433,076,521
5. Step 5: Solve for x
   x = 59,433,076,521/115,819.50
6. Step 6: Final answer
   x = 513,152.59