Finding the Third Proportional to 406,303.50 and 865,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,303.50 : 865,099.50 = 865,099.50 : x
2. Step 2: Convert to fraction form
   406,303.50/865,099.50 = 865,099.50/x
3. Step 3: Cross multiply
   406,303.50x = 865,099.50 × 865,099.50
4. Step 4: Simplify right side
   406,303.50x = 748,397,144,900.25
5. Step 5: Solve for x
   x = 748,397,144,900.25/406,303.50
6. Step 6: Final answer
   x = 1,841,965.78