Finding the Third Proportional to 363,897 and 789,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   363,897 : 789,643.50 = 789,643.50 : x
2. Step 2: Convert to fraction form
   363,897/789,643.50 = 789,643.50/x
3. Step 3: Cross multiply
   363,897x = 789,643.50 × 789,643.50
4. Step 4: Simplify right side
   363,897x = 623,536,857,092.25
5. Step 5: Solve for x
   x = 623,536,857,092.25/363,897
6. Step 6: Final answer
   x = 1,713,498.21