Finding the Third Proportional to 5,112,940 and 8,139,634

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112,940 : 8,139,634 = 8,139,634 : x
2. Step 2: Convert to fraction form
   5,112,940/8,139,634 = 8,139,634/x
3. Step 3: Cross multiply
   5,112,940x = 8,139,634 × 8,139,634
4. Step 4: Simplify right side
   5,112,940x = 66,253,641,653,956
5. Step 5: Solve for x
   x = 66,253,641,653,956/5,112,940
6. Step 6: Final answer
   x = 12,958,032.30