Finding the Third Proportional to 721,186 and 1,542,428

Step by Step Solution

1. Step 1: Write the proportion equation
   721,186 : 1,542,428 = 1,542,428 : x
2. Step 2: Convert to fraction form
   721,186/1,542,428 = 1,542,428/x
3. Step 3: Cross multiply
   721,186x = 1,542,428 × 1,542,428
4. Step 4: Simplify right side
   721,186x = 2,379,084,135,184
5. Step 5: Solve for x
   x = 2,379,084,135,184/721,186
6. Step 6: Final answer
   x = 3,298,849.58