Finding the Third Proportional to 7,287,680 and 10,872,640

Step by Step Solution

1. Step 1: Write the proportion equation
   7,287,680 : 10,872,640 = 10,872,640 : x
2. Step 2: Convert to fraction form
   7,287,680/10,872,640 = 10,872,640/x
3. Step 3: Cross multiply
   7,287,680x = 10,872,640 × 10,872,640
4. Step 4: Simplify right side
   7,287,680x = 118,214,300,569,600
5. Step 5: Solve for x
   x = 118,214,300,569,600/7,287,680
6. Step 6: Final answer
   x = 16,221,115.71