Finding the Third Proportional to 3,671,139 and 7,873,710

Step by Step Solution

1. Step 1: Write the proportion equation
   3,671,139 : 7,873,710 = 7,873,710 : x
2. Step 2: Convert to fraction form
   3,671,139/7,873,710 = 7,873,710/x
3. Step 3: Cross multiply
   3,671,139x = 7,873,710 × 7,873,710
4. Step 4: Simplify right side
   3,671,139x = 61,995,309,164,100
5. Step 5: Solve for x
   x = 61,995,309,164,100/3,671,139
6. Step 6: Final answer
   x = 16,887,213.79