Finding the Third Proportional to 2,518,350,879 and 5,390,470,200

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518,350,879 : 5,390,470,200 = 5,390,470,200 : x
2. Step 2: Convert to fraction form
   2,518,350,879/5,390,470,200 = 5,390,470,200/x
3. Step 3: Cross multiply
   2,518,350,879x = 5,390,470,200 × 5,390,470,200
4. Step 4: Simplify right side
   2,518,350,879x = 29,057,168,977,088,040,960
5. Step 5: Solve for x
   x = 29,057,168,977,088,040,960/2,518,350,879
6. Step 6: Final answer
   x = 11,538,173,341.69