Finding the Fourth Proportional to 117,128.56, 161,637.48 and 63,413.59

Step by Step Solution

1. Step 1: Write the proportion equation
   117,128.56 : 161,637.48 = 63,413.59 : x
2. Step 2: Convert to fraction form
   117,128.56/161,637.48 = 63,413.59/x
3. Step 3: Cross multiply
   117,128.56x = 161,637.48 × 63,413.59
4. Step 4: Simplify right side
   117,128.56x = 10,250,012,885.35
5. Step 5: Solve for x
   x = 10,250,012,885.35/117,128.56
6. Step 6: Final answer
   x = 87,510.79