Finding the Third Proportional to 2,543,786 and 5,390,836

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543,786 : 5,390,836 = 5,390,836 : x
2. Step 2: Convert to fraction form
   2,543,786/5,390,836 = 5,390,836/x
3. Step 3: Cross multiply
   2,543,786x = 5,390,836 × 5,390,836
4. Step 4: Simplify right side
   2,543,786x = 29,061,112,778,896
5. Step 5: Solve for x
   x = 29,061,112,778,896/2,543,786
6. Step 6: Final answer
   x = 11,424,354.40