Finding the Third Proportional to 721,484 and 1,142,389

Step by Step Solution

1. Step 1: Write the proportion equation
   721,484 : 1,142,389 = 1,142,389 : x
2. Step 2: Convert to fraction form
   721,484/1,142,389 = 1,142,389/x
3. Step 3: Cross multiply
   721,484x = 1,142,389 × 1,142,389
4. Step 4: Simplify right side
   721,484x = 1,305,052,627,321
5. Step 5: Solve for x
   x = 1,305,052,627,321/721,484
6. Step 6: Final answer
   x = 1,808,844.86