Finding the Third Proportional to 411,942 and 623,722.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,942 : 623,722.50 = 623,722.50 : x
2. Step 2: Convert to fraction form
   411,942/623,722.50 = 623,722.50/x
3. Step 3: Cross multiply
   411,942x = 623,722.50 × 623,722.50
4. Step 4: Simplify right side
   411,942x = 389,029,757,006.25
5. Step 5: Solve for x
   x = 389,029,757,006.25/411,942
6. Step 6: Final answer
   x = 944,379.93