Finding the Third Proportional to 3,903,320 and 8,458,240

Step by Step Solution

1. Step 1: Write the proportion equation
   3,903,320 : 8,458,240 = 8,458,240 : x
2. Step 2: Convert to fraction form
   3,903,320/8,458,240 = 8,458,240/x
3. Step 3: Cross multiply
   3,903,320x = 8,458,240 × 8,458,240
4. Step 4: Simplify right side
   3,903,320x = 71,541,823,897,600
5. Step 5: Solve for x
   x = 71,541,823,897,600/3,903,320
6. Step 6: Final answer
   x = 18,328,454.73