Finding the Third Proportional to 4,994,978 and 7,472,420

Step by Step Solution

1. Step 1: Write the proportion equation
   4,994,978 : 7,472,420 = 7,472,420 : x
2. Step 2: Convert to fraction form
   4,994,978/7,472,420 = 7,472,420/x
3. Step 3: Cross multiply
   4,994,978x = 7,472,420 × 7,472,420
4. Step 4: Simplify right side
   4,994,978x = 55,837,060,656,400
5. Step 5: Solve for x
   x = 55,837,060,656,400/4,994,978
6. Step 6: Final answer
   x = 11,178,639.96