Finding the Third Proportional to 878,645 and 1,918,426

Step by Step Solution

1. Step 1: Write the proportion equation
   878,645 : 1,918,426 = 1,918,426 : x
2. Step 2: Convert to fraction form
   878,645/1,918,426 = 1,918,426/x
3. Step 3: Cross multiply
   878,645x = 1,918,426 × 1,918,426
4. Step 4: Simplify right side
   878,645x = 3,680,358,317,476
5. Step 5: Solve for x
   x = 3,680,358,317,476/878,645
6. Step 6: Final answer
   x = 4,188,674.97