Finding the Fourth Proportional to 9,189,807,367.86, 12,681,599,352.54 and 5,120,498,819.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,189,807,367.86 : 12,681,599,352.54 = 5,120,498,819.97 : x
2. Step 2: Convert to fraction form
   9,189,807,367.86/12,681,599,352.54 = 5,120,498,819.97/x
3. Step 3: Cross multiply
   9,189,807,367.86x = 12,681,599,352.54 × 5,120,498,819.97
4. Step 4: Simplify right side
   9,189,807,367.86x = 64,936,114,520,013,398,016
5. Step 5: Solve for x
   x = 64,936,114,520,013,398,016/9,189,807,367.86
6. Step 6: Final answer
   x = 7,066,101,814.83