Finding the Third Proportional to 216,291 and 336,073.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,291 : 336,073.50 = 336,073.50 : x
2. Step 2: Convert to fraction form
   216,291/336,073.50 = 336,073.50/x
3. Step 3: Cross multiply
   216,291x = 336,073.50 × 336,073.50
4. Step 4: Simplify right side
   216,291x = 112,945,397,402.25
5. Step 5: Solve for x
   x = 112,945,397,402.25/216,291
6. Step 6: Final answer
   x = 522,191.85