Finding the Third Proportional to 1,221,204 and 2,645,688

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,204 : 2,645,688 = 2,645,688 : x
2. Step 2: Convert to fraction form
   1,221,204/2,645,688 = 2,645,688/x
3. Step 3: Cross multiply
   1,221,204x = 2,645,688 × 2,645,688
4. Step 4: Simplify right side
   1,221,204x = 6,999,664,993,344
5. Step 5: Solve for x
   x = 6,999,664,993,344/1,221,204
6. Step 6: Final answer
   x = 5,731,773.72