Finding the Fourth Proportional to 11,647.95, 17,459.61 and 7,940.98

Step by Step Solution

1. Step 1: Write the proportion equation
   11,647.95 : 17,459.61 = 7,940.98 : x
2. Step 2: Convert to fraction form
   11,647.95/17,459.61 = 7,940.98/x
3. Step 3: Cross multiply
   11,647.95x = 17,459.61 × 7,940.98
4. Step 4: Simplify right side
   11,647.95x = 138,646,413.82
5. Step 5: Solve for x
   x = 138,646,413.82/11,647.95
6. Step 6: Final answer
   x = 11,903.07