Finding the Third Proportional to 371,911.50 and 813,118.50

Step by Step Solution

1. Step 1: Write the proportion equation
   371,911.50 : 813,118.50 = 813,118.50 : x
2. Step 2: Convert to fraction form
   371,911.50/813,118.50 = 813,118.50/x
3. Step 3: Cross multiply
   371,911.50x = 813,118.50 × 813,118.50
4. Step 4: Simplify right side
   371,911.50x = 661,161,695,042.25
5. Step 5: Solve for x
   x = 661,161,695,042.25/371,911.50
6. Step 6: Final answer
   x = 1,777,739.31