Finding the Third Proportional to 878,607 and 1,918,323

Step by Step Solution

1. Step 1: Write the proportion equation
   878,607 : 1,918,323 = 1,918,323 : x
2. Step 2: Convert to fraction form
   878,607/1,918,323 = 1,918,323/x
3. Step 3: Cross multiply
   878,607x = 1,918,323 × 1,918,323
4. Step 4: Simplify right side
   878,607x = 3,679,963,132,329
5. Step 5: Solve for x
   x = 3,679,963,132,329/878,607
6. Step 6: Final answer
   x = 4,188,406.34