Finding the Third Proportional to 3,558,899 and 5,515,311

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558,899 : 5,515,311 = 5,515,311 : x
2. Step 2: Convert to fraction form
   3,558,899/5,515,311 = 5,515,311/x
3. Step 3: Cross multiply
   3,558,899x = 5,515,311 × 5,515,311
4. Step 4: Simplify right side
   3,558,899x = 30,418,655,426,721
5. Step 5: Solve for x
   x = 30,418,655,426,721/3,558,899
6. Step 6: Final answer
   x = 8,547,209.52