Finding the Fourth Proportional to 118,413.89, 163,406.31 and 64,700.75

Step by Step Solution

1. Step 1: Write the proportion equation
   118,413.89 : 163,406.31 = 64,700.75 : x
2. Step 2: Convert to fraction form
   118,413.89/163,406.31 = 64,700.75/x
3. Step 3: Cross multiply
   118,413.89x = 163,406.31 × 64,700.75
4. Step 4: Simplify right side
   118,413.89x = 10,572,510,811.73
5. Step 5: Solve for x
   x = 10,572,510,811.73/118,413.89
6. Step 6: Final answer
   x = 89,284.38