Finding the Third Proportional to 135,111.50 and 293,299

Step by Step Solution

1. Step 1: Write the proportion equation
   135,111.50 : 293,299 = 293,299 : x
2. Step 2: Convert to fraction form
   135,111.50/293,299 = 293,299/x
3. Step 3: Cross multiply
   135,111.50x = 293,299 × 293,299
4. Step 4: Simplify right side
   135,111.50x = 86,024,303,401
5. Step 5: Solve for x
   x = 86,024,303,401/135,111.50
6. Step 6: Final answer
   x = 636,691.20