Finding the Third Proportional to 211,320 and 309,393.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,320 : 309,393.50 = 309,393.50 : x
2. Step 2: Convert to fraction form
   211,320/309,393.50 = 309,393.50/x
3. Step 3: Cross multiply
   211,320x = 309,393.50 × 309,393.50
4. Step 4: Simplify right side
   211,320x = 95,724,337,842.25
5. Step 5: Solve for x
   x = 95,724,337,842.25/211,320
6. Step 6: Final answer
   x = 452,982.86