Finding the Third Proportional to 4,287,418 and 8,927,670

Step by Step Solution

1. Step 1: Write the proportion equation
   4,287,418 : 8,927,670 = 8,927,670 : x
2. Step 2: Convert to fraction form
   4,287,418/8,927,670 = 8,927,670/x
3. Step 3: Cross multiply
   4,287,418x = 8,927,670 × 8,927,670
4. Step 4: Simplify right side
   4,287,418x = 79,703,291,628,900
5. Step 5: Solve for x
   x = 79,703,291,628,900/4,287,418
6. Step 6: Final answer
   x = 18,590,044.55