Finding the Third Proportional to 9,638,820 and 12,850,326

Step by Step Solution

1. Step 1: Write the proportion equation
   9,638,820 : 12,850,326 = 12,850,326 : x
2. Step 2: Convert to fraction form
   9,638,820/12,850,326 = 12,850,326/x
3. Step 3: Cross multiply
   9,638,820x = 12,850,326 × 12,850,326
4. Step 4: Simplify right side
   9,638,820x = 165,130,878,306,276
5. Step 5: Solve for x
   x = 165,130,878,306,276/9,638,820
6. Step 6: Final answer
   x = 17,131,856.21