Finding the Third Proportional to 646,974 and 1,407,312

Step by Step Solution

1. Step 1: Write the proportion equation
   646,974 : 1,407,312 = 1,407,312 : x
2. Step 2: Convert to fraction form
   646,974/1,407,312 = 1,407,312/x
3. Step 3: Cross multiply
   646,974x = 1,407,312 × 1,407,312
4. Step 4: Simplify right side
   646,974x = 1,980,527,065,344
5. Step 5: Solve for x
   x = 1,980,527,065,344/646,974
6. Step 6: Final answer
   x = 3,061,215.85