Finding the Fourth Proportional to 89,413.71, 134,143.79 and 42,020.07

Step by Step Solution

1. Step 1: Write the proportion equation
   89,413.71 : 134,143.79 = 42,020.07 : x
2. Step 2: Convert to fraction form
   89,413.71/134,143.79 = 42,020.07/x
3. Step 3: Cross multiply
   89,413.71x = 134,143.79 × 42,020.07
4. Step 4: Simplify right side
   89,413.71x = 5,636,731,235.76
5. Step 5: Solve for x
   x = 5,636,731,235.76/89,413.71
6. Step 6: Final answer
   x = 63,041.02