Finding the Third Proportional to 8,461,508 and 12,890,658

Step by Step Solution

1. Step 1: Write the proportion equation
   8,461,508 : 12,890,658 = 12,890,658 : x
2. Step 2: Convert to fraction form
   8,461,508/12,890,658 = 12,890,658/x
3. Step 3: Cross multiply
   8,461,508x = 12,890,658 × 12,890,658
4. Step 4: Simplify right side
   8,461,508x = 166,169,063,672,964
5. Step 5: Solve for x
   x = 166,169,063,672,964/8,461,508
6. Step 6: Final answer
   x = 19,638,232.77