Finding the Third Proportional to 207,310.50 and 435,510

Step by Step Solution

1. Step 1: Write the proportion equation
   207,310.50 : 435,510 = 435,510 : x
2. Step 2: Convert to fraction form
   207,310.50/435,510 = 435,510/x
3. Step 3: Cross multiply
   207,310.50x = 435,510 × 435,510
4. Step 4: Simplify right side
   207,310.50x = 189,668,960,100
5. Step 5: Solve for x
   x = 189,668,960,100/207,310.50
6. Step 6: Final answer
   x = 914,902.82