Finding the Fourth Proportional to 117,128.84, 161,637.88 and 63,413.89

Step by Step Solution

1. Step 1: Write the proportion equation
   117,128.84 : 161,637.88 = 63,413.89 : x
2. Step 2: Convert to fraction form
   117,128.84/161,637.88 = 63,413.89/x
3. Step 3: Cross multiply
   117,128.84x = 161,637.88 × 63,413.89
4. Step 4: Simplify right side
   117,128.84x = 10,250,086,298.42
5. Step 5: Solve for x
   x = 10,250,086,298.42/117,128.84
6. Step 6: Final answer
   x = 87,511.21