Finding the Third Proportional to 978,690 and 2,156,055

Step by Step Solution

1. Step 1: Write the proportion equation
   978,690 : 2,156,055 = 2,156,055 : x
2. Step 2: Convert to fraction form
   978,690/2,156,055 = 2,156,055/x
3. Step 3: Cross multiply
   978,690x = 2,156,055 × 2,156,055
4. Step 4: Simplify right side
   978,690x = 4,648,573,163,025
5. Step 5: Solve for x
   x = 4,648,573,163,025/978,690
6. Step 6: Final answer
   x = 4,749,791.21