Finding the Third Proportional to 863,928 and 1,878,640

Step by Step Solution

1. Step 1: Write the proportion equation
   863,928 : 1,878,640 = 1,878,640 : x
2. Step 2: Convert to fraction form
   863,928/1,878,640 = 1,878,640/x
3. Step 3: Cross multiply
   863,928x = 1,878,640 × 1,878,640
4. Step 4: Simplify right side
   863,928x = 3,529,288,249,600
5. Step 5: Solve for x
   x = 3,529,288,249,600/863,928
6. Step 6: Final answer
   x = 4,085,164.79