Finding the Third Proportional to 9,638,821 and 12,850,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,638,821 : 12,850,327.50 = 12,850,327.50 : x
2. Step 2: Convert to fraction form
   9,638,821/12,850,327.50 = 12,850,327.50/x
3. Step 3: Cross multiply
   9,638,821x = 12,850,327.50 × 12,850,327.50
4. Step 4: Simplify right side
   9,638,821x = 165,130,916,857,256.25
5. Step 5: Solve for x
   x = 165,130,916,857,256.25/9,638,821
6. Step 6: Final answer
   x = 17,131,858.44