Finding the Third Proportional to 646,985 and 1,407,334

Step by Step Solution

1. Step 1: Write the proportion equation
   646,985 : 1,407,334 = 1,407,334 : x
2. Step 2: Convert to fraction form
   646,985/1,407,334 = 1,407,334/x
3. Step 3: Cross multiply
   646,985x = 1,407,334 × 1,407,334
4. Step 4: Simplify right side
   646,985x = 1,980,588,987,556
5. Step 5: Solve for x
   x = 1,980,588,987,556/646,985
6. Step 6: Final answer
   x = 3,061,259.52