Finding the Third Proportional to 580,438 and 879,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   580,438 : 879,435.50 = 879,435.50 : x
2. Step 2: Convert to fraction form
   580,438/879,435.50 = 879,435.50/x
3. Step 3: Cross multiply
   580,438x = 879,435.50 × 879,435.50
4. Step 4: Simplify right side
   580,438x = 773,406,798,660.25
5. Step 5: Solve for x
   x = 773,406,798,660.25/580,438
6. Step 6: Final answer
   x = 1,332,453.77