Finding the Fourth Proportional to 117,128.81, 161,637.83 and 63,413.84

Step by Step Solution

1. Step 1: Write the proportion equation
   117,128.81 : 161,637.83 = 63,413.84 : x
2. Step 2: Convert to fraction form
   117,128.81/161,637.83 = 63,413.84/x
3. Step 3: Cross multiply
   117,128.81x = 161,637.83 × 63,413.84
4. Step 4: Simplify right side
   117,128.81x = 10,250,075,172.50
5. Step 5: Solve for x
   x = 10,250,075,172.50/117,128.81
6. Step 6: Final answer
   x = 87,511.14