Finding the Third Proportional to 2,421,642 and 5,138,466

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421,642 : 5,138,466 = 5,138,466 : x
2. Step 2: Convert to fraction form
   2,421,642/5,138,466 = 5,138,466/x
3. Step 3: Cross multiply
   2,421,642x = 5,138,466 × 5,138,466
4. Step 4: Simplify right side
   2,421,642x = 26,403,832,833,156
5. Step 5: Solve for x
   x = 26,403,832,833,156/2,421,642
6. Step 6: Final answer
   x = 10,903,276.72