Finding the Third Proportional to 721,428 and 1,567,272

Step by Step Solution

1. Step 1: Write the proportion equation
   721,428 : 1,567,272 = 1,567,272 : x
2. Step 2: Convert to fraction form
   721,428/1,567,272 = 1,567,272/x
3. Step 3: Cross multiply
   721,428x = 1,567,272 × 1,567,272
4. Step 4: Simplify right side
   721,428x = 2,456,341,521,984
5. Step 5: Solve for x
   x = 2,456,341,521,984/721,428
6. Step 6: Final answer
   x = 3,404,832.53