Finding the Third Proportional to 839,112 and 1,258,380

Step by Step Solution

1. Step 1: Write the proportion equation
   839,112 : 1,258,380 = 1,258,380 : x
2. Step 2: Convert to fraction form
   839,112/1,258,380 = 1,258,380/x
3. Step 3: Cross multiply
   839,112x = 1,258,380 × 1,258,380
4. Step 4: Simplify right side
   839,112x = 1,583,520,224,400
5. Step 5: Solve for x
   x = 1,583,520,224,400/839,112
6. Step 6: Final answer
   x = 1,887,138.10