Finding the Third Proportional to 3,287,172 and 7,172,280

Step by Step Solution

1. Step 1: Write the proportion equation
   3,287,172 : 7,172,280 = 7,172,280 : x
2. Step 2: Convert to fraction form
   3,287,172/7,172,280 = 7,172,280/x
3. Step 3: Cross multiply
   3,287,172x = 7,172,280 × 7,172,280
4. Step 4: Simplify right side
   3,287,172x = 51,441,600,398,400
5. Step 5: Solve for x
   x = 51,441,600,398,400/3,287,172
6. Step 6: Final answer
   x = 15,649,196.45