Finding the Third Proportional to 580,440 and 879,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   580,440 : 879,438.50 = 879,438.50 : x
2. Step 2: Convert to fraction form
   580,440/879,438.50 = 879,438.50/x
3. Step 3: Cross multiply
   580,440x = 879,438.50 × 879,438.50
4. Step 4: Simplify right side
   580,440x = 773,412,075,282.25
5. Step 5: Solve for x
   x = 773,412,075,282.25/580,440
6. Step 6: Final answer
   x = 1,332,458.26