Finding the Third Proportional to 2,639,688 and 4,117,284

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639,688 : 4,117,284 = 4,117,284 : x
2. Step 2: Convert to fraction form
   2,639,688/4,117,284 = 4,117,284/x
3. Step 3: Cross multiply
   2,639,688x = 4,117,284 × 4,117,284
4. Step 4: Simplify right side
   2,639,688x = 16,952,027,536,656
5. Step 5: Solve for x
   x = 16,952,027,536,656/2,639,688
6. Step 6: Final answer
   x = 6,421,981.51