Finding the Fourth Proportional to 2,791,345,142.88, 3,851,944,146.81 and 1,521,159,154.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791,345,142.88 : 3,851,944,146.81 = 1,521,159,154.23 : x
2. Step 2: Convert to fraction form
   2,791,345,142.88/3,851,944,146.81 = 1,521,159,154.23/x
3. Step 3: Cross multiply
   2,791,345,142.88x = 3,851,944,146.81 × 1,521,159,154.23
4. Step 4: Simplify right side
   2,791,345,142.88x = 5,859,420,100,502,699,008
5. Step 5: Solve for x
   x = 5,859,420,100,502,699,008/2,791,345,142.88
6. Step 6: Final answer
   x = 2,099,138,515.87