Finding the Third Proportional to 658,870 and 1,438,578

Step by Step Solution

1. Step 1: Write the proportion equation
   658,870 : 1,438,578 = 1,438,578 : x
2. Step 2: Convert to fraction form
   658,870/1,438,578 = 1,438,578/x
3. Step 3: Cross multiply
   658,870x = 1,438,578 × 1,438,578
4. Step 4: Simplify right side
   658,870x = 2,069,506,662,084
5. Step 5: Solve for x
   x = 2,069,506,662,084/658,870
6. Step 6: Final answer
   x = 3,140,993.92