Finding the Third Proportional to 3,139,978 and 6,761,086

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139,978 : 6,761,086 = 6,761,086 : x
2. Step 2: Convert to fraction form
   3,139,978/6,761,086 = 6,761,086/x
3. Step 3: Cross multiply
   3,139,978x = 6,761,086 × 6,761,086
4. Step 4: Simplify right side
   3,139,978x = 45,712,283,899,396
5. Step 5: Solve for x
   x = 45,712,283,899,396/3,139,978
6. Step 6: Final answer
   x = 14,558,154.20