Finding the Third Proportional to 3,316,280 and 7,139,920

Step by Step Solution

1. Step 1: Write the proportion equation
   3,316,280 : 7,139,920 = 7,139,920 : x
2. Step 2: Convert to fraction form
   3,316,280/7,139,920 = 7,139,920/x
3. Step 3: Cross multiply
   3,316,280x = 7,139,920 × 7,139,920
4. Step 4: Simplify right side
   3,316,280x = 50,978,457,606,400
5. Step 5: Solve for x
   x = 50,978,457,606,400/3,316,280
6. Step 6: Final answer
   x = 15,372,181.36