Finding the Third Proportional to 646,688 and 1,410,848

Step by Step Solution

1. Step 1: Write the proportion equation
   646,688 : 1,410,848 = 1,410,848 : x
2. Step 2: Convert to fraction form
   646,688/1,410,848 = 1,410,848/x
3. Step 3: Cross multiply
   646,688x = 1,410,848 × 1,410,848
4. Step 4: Simplify right side
   646,688x = 1,990,492,079,104
5. Step 5: Solve for x
   x = 1,990,492,079,104/646,688
6. Step 6: Final answer
   x = 3,077,978.99