Finding the Third Proportional to 388,565 and 836,178.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,565 : 836,178.50 = 836,178.50 : x
2. Step 2: Convert to fraction form
   388,565/836,178.50 = 836,178.50/x
3. Step 3: Cross multiply
   388,565x = 836,178.50 × 836,178.50
4. Step 4: Simplify right side
   388,565x = 699,194,483,862.25
5. Step 5: Solve for x
   x = 699,194,483,862.25/388,565
6. Step 6: Final answer
   x = 1,799,427.34