Finding the Third Proportional to 3,638,170 and 7,921,788

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638,170 : 7,921,788 = 7,921,788 : x
2. Step 2: Convert to fraction form
   3,638,170/7,921,788 = 7,921,788/x
3. Step 3: Cross multiply
   3,638,170x = 7,921,788 × 7,921,788
4. Step 4: Simplify right side
   3,638,170x = 62,754,725,116,944
5. Step 5: Solve for x
   x = 62,754,725,116,944/3,638,170
6. Step 6: Final answer
   x = 17,248,980.98