Finding the Third Proportional to 721,290 and 1,122,760

Step by Step Solution

1. Step 1: Write the proportion equation
   721,290 : 1,122,760 = 1,122,760 : x
2. Step 2: Convert to fraction form
   721,290/1,122,760 = 1,122,760/x
3. Step 3: Cross multiply
   721,290x = 1,122,760 × 1,122,760
4. Step 4: Simplify right side
   721,290x = 1,260,590,017,600
5. Step 5: Solve for x
   x = 1,260,590,017,600/721,290
6. Step 6: Final answer
   x = 1,747,688.19