Finding the Third Proportional to 5,389,147 and 8,139,672

Step by Step Solution

1. Step 1: Write the proportion equation
   5,389,147 : 8,139,672 = 8,139,672 : x
2. Step 2: Convert to fraction form
   5,389,147/8,139,672 = 8,139,672/x
3. Step 3: Cross multiply
   5,389,147x = 8,139,672 × 8,139,672
4. Step 4: Simplify right side
   5,389,147x = 66,254,260,267,584
5. Step 5: Solve for x
   x = 66,254,260,267,584/5,389,147
6. Step 6: Final answer
   x = 12,294,016.15