Finding the Third Proportional to 588,218 and 879,978

Step by Step Solution

1. Step 1: Write the proportion equation
   588,218 : 879,978 = 879,978 : x
2. Step 2: Convert to fraction form
   588,218/879,978 = 879,978/x
3. Step 3: Cross multiply
   588,218x = 879,978 × 879,978
4. Step 4: Simplify right side
   588,218x = 774,361,280,484
5. Step 5: Solve for x
   x = 774,361,280,484/588,218
6. Step 6: Final answer
   x = 1,316,452.88