Finding the Third Proportional to 5,643,978 and 12,411,642

Step by Step Solution

1. Step 1: Write the proportion equation
   5,643,978 : 12,411,642 = 12,411,642 : x
2. Step 2: Convert to fraction form
   5,643,978/12,411,642 = 12,411,642/x
3. Step 3: Cross multiply
   5,643,978x = 12,411,642 × 12,411,642
4. Step 4: Simplify right side
   5,643,978x = 154,048,857,136,164
5. Step 5: Solve for x
   x = 154,048,857,136,164/5,643,978
6. Step 6: Final answer
   x = 27,294,375.91