Finding the Third Proportional to 2,521,568,663.91 and 5,518,145,590.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521,568,663.91 : 5,518,145,590.69 = 5,518,145,590.69 : x
2. Step 2: Convert to fraction form
   2,521,568,663.91/5,518,145,590.69 = 5,518,145,590.69/x
3. Step 3: Cross multiply
   2,521,568,663.91x = 5,518,145,590.69 × 5,518,145,590.69
4. Step 4: Simplify right side
   2,521,568,663.91x = 30,449,930,760,023,900,160
5. Step 5: Solve for x
   x = 30,449,930,760,023,900,160/2,521,568,663.91
6. Step 6: Final answer
   x = 12,075,788,851.55