Finding the Third Proportional to 2,218,280 and 4,541,640

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218,280 : 4,541,640 = 4,541,640 : x
2. Step 2: Convert to fraction form
   2,218,280/4,541,640 = 4,541,640/x
3. Step 3: Cross multiply
   2,218,280x = 4,541,640 × 4,541,640
4. Step 4: Simplify right side
   2,218,280x = 20,626,493,889,600
5. Step 5: Solve for x
   x = 20,626,493,889,600/2,218,280
6. Step 6: Final answer
   x = 9,298,417.64