Finding the Third Proportional to 8,137,807 and 12,589,361

Step by Step Solution

1. Step 1: Write the proportion equation
   8,137,807 : 12,589,361 = 12,589,361 : x
2. Step 2: Convert to fraction form
   8,137,807/12,589,361 = 12,589,361/x
3. Step 3: Cross multiply
   8,137,807x = 12,589,361 × 12,589,361
4. Step 4: Simplify right side
   8,137,807x = 158,492,010,388,321
5. Step 5: Solve for x
   x = 158,492,010,388,321/8,137,807
6. Step 6: Final answer
   x = 19,476,009.99