Finding the Fourth Proportional to 2,139,967,112.06, 2,942,682,449.58 and 1,857,218,670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,967,112.06 : 2,942,682,449.58 = 1,857,218,670.72 : x
2. Step 2: Convert to fraction form
   2,139,967,112.06/2,942,682,449.58 = 1,857,218,670.72/x
3. Step 3: Cross multiply
   2,139,967,112.06x = 2,942,682,449.58 × 1,857,218,670.72
4. Step 4: Simplify right side
   2,139,967,112.06x = 5,465,204,787,360,040,960
5. Step 5: Solve for x
   x = 5,465,204,787,360,040,960/2,139,967,112.06
6. Step 6: Final answer
   x = 2,553,873,261.21