Finding the Fourth Proportional to 118,419.39, 163,413.90 and 64,706.25

Step by Step Solution

1. Step 1: Write the proportion equation
   118,419.39 : 163,413.90 = 64,706.25 : x
2. Step 2: Convert to fraction form
   118,419.39/163,413.90 = 64,706.25/x
3. Step 3: Cross multiply
   118,419.39x = 163,413.90 × 64,706.25
4. Step 4: Simplify right side
   118,419.39x = 10,573,900,666.88
5. Step 5: Solve for x
   x = 10,573,900,666.88/118,419.39
6. Step 6: Final answer
   x = 89,291.97