Finding the Third Proportional to 986,391 and 2,120,196

Step by Step Solution

1. Step 1: Write the proportion equation
   986,391 : 2,120,196 = 2,120,196 : x
2. Step 2: Convert to fraction form
   986,391/2,120,196 = 2,120,196/x
3. Step 3: Cross multiply
   986,391x = 2,120,196 × 2,120,196
4. Step 4: Simplify right side
   986,391x = 4,495,231,078,416
5. Step 5: Solve for x
   x = 4,495,231,078,416/986,391
6. Step 6: Final answer
   x = 4,557,250.70