Finding the Third Proportional to 8,461,496 and 12,890,640

Step by Step Solution

1. Step 1: Write the proportion equation
   8,461,496 : 12,890,640 = 12,890,640 : x
2. Step 2: Convert to fraction form
   8,461,496/12,890,640 = 12,890,640/x
3. Step 3: Cross multiply
   8,461,496x = 12,890,640 × 12,890,640
4. Step 4: Simplify right side
   8,461,496x = 166,168,599,609,600
5. Step 5: Solve for x
   x = 166,168,599,609,600/8,461,496
6. Step 6: Final answer
   x = 19,638,205.77