Finding the Third Proportional to 2,543,642 and 5,390,548

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543,642 : 5,390,548 = 5,390,548 : x
2. Step 2: Convert to fraction form
   2,543,642/5,390,548 = 5,390,548/x
3. Step 3: Cross multiply
   2,543,642x = 5,390,548 × 5,390,548
4. Step 4: Simplify right side
   2,543,642x = 29,058,007,740,304
5. Step 5: Solve for x
   x = 29,058,007,740,304/2,543,642
6. Step 6: Final answer
   x = 11,423,780.45