Finding the Fourth Proportional to 1,136,636,429.88, 1,568,557,642.86 and 641,603,413.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136,636,429.88 : 1,568,557,642.86 = 641,603,413.56 : x
2. Step 2: Convert to fraction form
   1,136,636,429.88/1,568,557,642.86 = 641,603,413.56/x
3. Step 3: Cross multiply
   1,136,636,429.88x = 1,568,557,642.86 × 641,603,413.56
4. Step 4: Simplify right side
   1,136,636,429.88x = 1,006,391,938,024,603,264
5. Step 5: Solve for x
   x = 1,006,391,938,024,603,264/1,136,636,429.88
6. Step 6: Final answer
   x = 885,412,354.88