Finding the Third Proportional to 5,389,141 and 8,139,661

Step by Step Solution

1. Step 1: Write the proportion equation
   5,389,141 : 8,139,661 = 8,139,661 : x
2. Step 2: Convert to fraction form
   5,389,141/8,139,661 = 8,139,661/x
3. Step 3: Cross multiply
   5,389,141x = 8,139,661 × 8,139,661
4. Step 4: Simplify right side
   5,389,141x = 66,254,081,194,921
5. Step 5: Solve for x
   x = 66,254,081,194,921/5,389,141
6. Step 6: Final answer
   x = 12,293,996.61