Finding the Third Proportional to 1,317,680 and 2,876,320

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317,680 : 2,876,320 = 2,876,320 : x
2. Step 2: Convert to fraction form
   1,317,680/2,876,320 = 2,876,320/x
3. Step 3: Cross multiply
   1,317,680x = 2,876,320 × 2,876,320
4. Step 4: Simplify right side
   1,317,680x = 8,273,216,742,400
5. Step 5: Solve for x
   x = 8,273,216,742,400/1,317,680
6. Step 6: Final answer
   x = 6,278,623.60