Finding the Third Proportional to 878,404 and 1,917,440

Step by Step Solution

1. Step 1: Write the proportion equation
   878,404 : 1,917,440 = 1,917,440 : x
2. Step 2: Convert to fraction form
   878,404/1,917,440 = 1,917,440/x
3. Step 3: Cross multiply
   878,404x = 1,917,440 × 1,917,440
4. Step 4: Simplify right side
   878,404x = 3,676,576,153,600
5. Step 5: Solve for x
   x = 3,676,576,153,600/878,404
6. Step 6: Final answer
   x = 4,185,518.46