Finding the Third Proportional to 405,120 and 879,360

Step by Step Solution

1. Step 1: Write the proportion equation
   405,120 : 879,360 = 879,360 : x
2. Step 2: Convert to fraction form
   405,120/879,360 = 879,360/x
3. Step 3: Cross multiply
   405,120x = 879,360 × 879,360
4. Step 4: Simplify right side
   405,120x = 773,274,009,600
5. Step 5: Solve for x
   x = 773,274,009,600/405,120
6. Step 6: Final answer
   x = 1,908,752.99