Finding the Third Proportional to 139,441.50 and 286,299

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441.50 : 286,299 = 286,299 : x
2. Step 2: Convert to fraction form
   139,441.50/286,299 = 286,299/x
3. Step 3: Cross multiply
   139,441.50x = 286,299 × 286,299
4. Step 4: Simplify right side
   139,441.50x = 81,967,117,401
5. Step 5: Solve for x
   x = 81,967,117,401/139,441.50
6. Step 6: Final answer
   x = 587,824.41