Finding the Third Proportional to 387,243 and 843,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,243 : 843,382.50 = 843,382.50 : x
2. Step 2: Convert to fraction form
   387,243/843,382.50 = 843,382.50/x
3. Step 3: Cross multiply
   387,243x = 843,382.50 × 843,382.50
4. Step 4: Simplify right side
   387,243x = 711,294,041,306.25
5. Step 5: Solve for x
   x = 711,294,041,306.25/387,243
6. Step 6: Final answer
   x = 1,836,815.75