Finding the Third Proportional to 978,384 and 2,124,396

Step by Step Solution

1. Step 1: Write the proportion equation
   978,384 : 2,124,396 = 2,124,396 : x
2. Step 2: Convert to fraction form
   978,384/2,124,396 = 2,124,396/x
3. Step 3: Cross multiply
   978,384x = 2,124,396 × 2,124,396
4. Step 4: Simplify right side
   978,384x = 4,513,058,364,816
5. Step 5: Solve for x
   x = 4,513,058,364,816/978,384
6. Step 6: Final answer
   x = 4,612,767.96