Finding the Third Proportional to 4,210,112 and 8,860,336

Step by Step Solution

1. Step 1: Write the proportion equation
   4,210,112 : 8,860,336 = 8,860,336 : x
2. Step 2: Convert to fraction form
   4,210,112/8,860,336 = 8,860,336/x
3. Step 3: Cross multiply
   4,210,112x = 8,860,336 × 8,860,336
4. Step 4: Simplify right side
   4,210,112x = 78,505,554,032,896
5. Step 5: Solve for x
   x = 78,505,554,032,896/4,210,112
6. Step 6: Final answer
   x = 18,646,903.94