Finding the Third Proportional to 721,432 and 1,551,398

Step by Step Solution

1. Step 1: Write the proportion equation
   721,432 : 1,551,398 = 1,551,398 : x
2. Step 2: Convert to fraction form
   721,432/1,551,398 = 1,551,398/x
3. Step 3: Cross multiply
   721,432x = 1,551,398 × 1,551,398
4. Step 4: Simplify right side
   721,432x = 2,406,835,754,404
5. Step 5: Solve for x
   x = 2,406,835,754,404/721,432
6. Step 6: Final answer
   x = 3,336,192.12