Finding the Fourth Proportional to 118,420.58, 163,413.55 and 64,706.04

Step by Step Solution

1. Step 1: Write the proportion equation
   118,420.58 : 163,413.55 = 64,706.04 : x
2. Step 2: Convert to fraction form
   118,420.58/163,413.55 = 64,706.04/x
3. Step 3: Cross multiply
   118,420.58x = 163,413.55 × 64,706.04
4. Step 4: Simplify right side
   118,420.58x = 10,573,843,783.72
5. Step 5: Solve for x
   x = 10,573,843,783.72/118,420.58
6. Step 6: Final answer
   x = 89,290.59