Finding the Fourth Proportional to 99,413.47, 137,145.90 and 59,105.26

Step by Step Solution

1. Step 1: Write the proportion equation
   99,413.47 : 137,145.90 = 59,105.26 : x
2. Step 2: Convert to fraction form
   99,413.47/137,145.90 = 59,105.26/x
3. Step 3: Cross multiply
   99,413.47x = 137,145.90 × 59,105.26
4. Step 4: Simplify right side
   99,413.47x = 8,106,044,077.43
5. Step 5: Solve for x
   x = 8,106,044,077.43/99,413.47
6. Step 6: Final answer
   x = 81,538.69