Finding the Fourth Proportional to 118,413.90, 163,410.89 and 64,699.32

Step by Step Solution

1. Step 1: Write the proportion equation
   118,413.90 : 163,410.89 = 64,699.32 : x
2. Step 2: Convert to fraction form
   118,413.90/163,410.89 = 64,699.32/x
3. Step 3: Cross multiply
   118,413.90x = 163,410.89 × 64,699.32
4. Step 4: Simplify right side
   118,413.90x = 10,572,573,463.59
5. Step 5: Solve for x
   x = 10,572,573,463.59/118,413.90
6. Step 6: Final answer
   x = 89,284.90