Finding the Third Proportional to 3,663,408 and 5,385,420

Step by Step Solution

1. Step 1: Write the proportion equation
   3,663,408 : 5,385,420 = 5,385,420 : x
2. Step 2: Convert to fraction form
   3,663,408/5,385,420 = 5,385,420/x
3. Step 3: Cross multiply
   3,663,408x = 5,385,420 × 5,385,420
4. Step 4: Simplify right side
   3,663,408x = 29,002,748,576,400
5. Step 5: Solve for x
   x = 29,002,748,576,400/3,663,408
6. Step 6: Final answer
   x = 7,916,876.46