Finding the Third Proportional to 2,515,440 and 5,429,256

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515,440 : 5,429,256 = 5,429,256 : x
2. Step 2: Convert to fraction form
   2,515,440/5,429,256 = 5,429,256/x
3. Step 3: Cross multiply
   2,515,440x = 5,429,256 × 5,429,256
4. Step 4: Simplify right side
   2,515,440x = 29,476,820,713,536
5. Step 5: Solve for x
   x = 29,476,820,713,536/2,515,440
6. Step 6: Final answer
   x = 11,718,355.72