Finding the Third Proportional to 3,909,444 and 8,142,470

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909,444 : 8,142,470 = 8,142,470 : x
2. Step 2: Convert to fraction form
   3,909,444/8,142,470 = 8,142,470/x
3. Step 3: Cross multiply
   3,909,444x = 8,142,470 × 8,142,470
4. Step 4: Simplify right side
   3,909,444x = 66,299,817,700,900
5. Step 5: Solve for x
   x = 66,299,817,700,900/3,909,444
6. Step 6: Final answer
   x = 16,958,886.66