Finding the Third Proportional to 2,571,518,788 and 5,581,417,208

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571,518,788 : 5,581,417,208 = 5,581,417,208 : x
2. Step 2: Convert to fraction form
   2,571,518,788/5,581,417,208 = 5,581,417,208/x
3. Step 3: Cross multiply
   2,571,518,788x = 5,581,417,208 × 5,581,417,208
4. Step 4: Simplify right side
   2,571,518,788x = 31,152,218,049,758,515,200
5. Step 5: Solve for x
   x = 31,152,218,049,758,515,200/2,571,518,788
6. Step 6: Final answer
   x = 12,114,326,442.07