Finding the Third Proportional to 3,858,792 and 8,403,312

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858,792 : 8,403,312 = 8,403,312 : x
2. Step 2: Convert to fraction form
   3,858,792/8,403,312 = 8,403,312/x
3. Step 3: Cross multiply
   3,858,792x = 8,403,312 × 8,403,312
4. Step 4: Simplify right side
   3,858,792x = 70,615,652,569,344
5. Step 5: Solve for x
   x = 70,615,652,569,344/3,858,792
6. Step 6: Final answer
   x = 18,299,937.54