Finding the Fourth Proportional to 1,218,410,061.69, 1,682,983,124.37 and 1,007,568,545.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,410,061.69 : 1,682,983,124.37 = 1,007,568,545.61 : x
2. Step 2: Convert to fraction form
   1,218,410,061.69/1,682,983,124.37 = 1,007,568,545.61/x
3. Step 3: Cross multiply
   1,218,410,061.69x = 1,682,983,124.37 × 1,007,568,545.61
4. Step 4: Simplify right side
   1,218,410,061.69x = 1,695,720,858,907,654,656
5. Step 5: Solve for x
   x = 1,695,720,858,907,654,656/1,218,410,061.69
6. Step 6: Final answer
   x = 1,391,748,896.55