Finding the Fourth Proportional to 120,111.41, 165,763.67 and 66,413.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,111.41 : 165,763.67 = 66,413.72 : x
2. Step 2: Convert to fraction form
   120,111.41/165,763.67 = 66,413.72/x
3. Step 3: Cross multiply
   120,111.41x = 165,763.67 × 66,413.72
4. Step 4: Simplify right side
   120,111.41x = 11,008,982,047.89
5. Step 5: Solve for x
   x = 11,008,982,047.89/120,111.41
6. Step 6: Final answer
   x = 91,656.42