Finding the Third Proportional to 388,440 and 830,850

Step by Step Solution

1. Step 1: Write the proportion equation
   388,440 : 830,850 = 830,850 : x
2. Step 2: Convert to fraction form
   388,440/830,850 = 830,850/x
3. Step 3: Cross multiply
   388,440x = 830,850 × 830,850
4. Step 4: Simplify right side
   388,440x = 690,311,722,500
5. Step 5: Solve for x
   x = 690,311,722,500/388,440
6. Step 6: Final answer
   x = 1,777,138.61