Finding the Third Proportional to 211,323 and 309,397.50

Step by Step Solution

1. Step 1: Write the proportion equation
   211,323 : 309,397.50 = 309,397.50 : x
2. Step 2: Convert to fraction form
   211,323/309,397.50 = 309,397.50/x
3. Step 3: Cross multiply
   211,323x = 309,397.50 × 309,397.50
4. Step 4: Simplify right side
   211,323x = 95,726,813,006.25
5. Step 5: Solve for x
   x = 95,726,813,006.25/211,323
6. Step 6: Final answer
   x = 452,988.14