Finding the Third Proportional to 207,210 and 309,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   207,210 : 309,535.50 = 309,535.50 : x
2. Step 2: Convert to fraction form
   207,210/309,535.50 = 309,535.50/x
3. Step 3: Cross multiply
   207,210x = 309,535.50 × 309,535.50
4. Step 4: Simplify right side
   207,210x = 95,812,225,760.25
5. Step 5: Solve for x
   x = 95,812,225,760.25/207,210
6. Step 6: Final answer
   x = 462,391.90