Finding the Third Proportional to 6,331,540 and 12,886,656

Step by Step Solution

1. Step 1: Write the proportion equation
   6,331,540 : 12,886,656 = 12,886,656 : x
2. Step 2: Convert to fraction form
   6,331,540/12,886,656 = 12,886,656/x
3. Step 3: Cross multiply
   6,331,540x = 12,886,656 × 12,886,656
4. Step 4: Simplify right side
   6,331,540x = 166,065,902,862,336
5. Step 5: Solve for x
   x = 166,065,902,862,336/6,331,540
6. Step 6: Final answer
   x = 26,228,358.80