Finding the Third Proportional to 580,561 and 879,589.50

Step by Step Solution

1. Step 1: Write the proportion equation
   580,561 : 879,589.50 = 879,589.50 : x
2. Step 2: Convert to fraction form
   580,561/879,589.50 = 879,589.50/x
3. Step 3: Cross multiply
   580,561x = 879,589.50 × 879,589.50
4. Step 4: Simplify right side
   580,561x = 773,677,688,510.25
5. Step 5: Solve for x
   x = 773,677,688,510.25/580,561
6. Step 6: Final answer
   x = 1,332,638.07