Finding the Third Proportional to 787,870 and 1,728,920

Step by Step Solution

1. Step 1: Write the proportion equation
   787,870 : 1,728,920 = 1,728,920 : x
2. Step 2: Convert to fraction form
   787,870/1,728,920 = 1,728,920/x
3. Step 3: Cross multiply
   787,870x = 1,728,920 × 1,728,920
4. Step 4: Simplify right side
   787,870x = 2,989,164,366,400
5. Step 5: Solve for x
   x = 2,989,164,366,400/787,870
6. Step 6: Final answer
   x = 3,793,981.71