Finding the Third Proportional to 878,296 and 1,917,240

Step by Step Solution

1. Step 1: Write the proportion equation
   878,296 : 1,917,240 = 1,917,240 : x
2. Step 2: Convert to fraction form
   878,296/1,917,240 = 1,917,240/x
3. Step 3: Cross multiply
   878,296x = 1,917,240 × 1,917,240
4. Step 4: Simplify right side
   878,296x = 3,675,809,217,600
5. Step 5: Solve for x
   x = 3,675,809,217,600/878,296
6. Step 6: Final answer
   x = 4,185,159.92