Finding the Third Proportional to 5,403,402 and 8,216,502

Step by Step Solution

1. Step 1: Write the proportion equation
   5,403,402 : 8,216,502 = 8,216,502 : x
2. Step 2: Convert to fraction form
   5,403,402/8,216,502 = 8,216,502/x
3. Step 3: Cross multiply
   5,403,402x = 8,216,502 × 8,216,502
4. Step 4: Simplify right side
   5,403,402x = 67,510,905,116,004
5. Step 5: Solve for x
   x = 67,510,905,116,004/5,403,402
6. Step 6: Final answer
   x = 12,494,148.15