Finding the Third Proportional to 2,639,680 and 4,117,272

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639,680 : 4,117,272 = 4,117,272 : x
2. Step 2: Convert to fraction form
   2,639,680/4,117,272 = 4,117,272/x
3. Step 3: Cross multiply
   2,639,680x = 4,117,272 × 4,117,272
4. Step 4: Simplify right side
   2,639,680x = 16,951,928,721,984
5. Step 5: Solve for x
   x = 16,951,928,721,984/2,639,680
6. Step 6: Final answer
   x = 6,421,963.54