Finding the Third Proportional to 387,378 and 836,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,378 : 836,998.50 = 836,998.50 : x
2. Step 2: Convert to fraction form
   387,378/836,998.50 = 836,998.50/x
3. Step 3: Cross multiply
   387,378x = 836,998.50 × 836,998.50
4. Step 4: Simplify right side
   387,378x = 700,566,489,002.25
5. Step 5: Solve for x
   x = 700,566,489,002.25/387,378
6. Step 6: Final answer
   x = 1,808,482.90