Finding the Third Proportional to 646,656 and 1,409,124

Step by Step Solution

1. Step 1: Write the proportion equation
   646,656 : 1,409,124 = 1,409,124 : x
2. Step 2: Convert to fraction form
   646,656/1,409,124 = 1,409,124/x
3. Step 3: Cross multiply
   646,656x = 1,409,124 × 1,409,124
4. Step 4: Simplify right side
   646,656x = 1,985,630,447,376
5. Step 5: Solve for x
   x = 1,985,630,447,376/646,656
6. Step 6: Final answer
   x = 3,070,613.20