Finding the Fourth Proportional to 12,477.15, 17,219.12 and 7,172.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.15 : 17,219.12 = 7,172.46 : x
2. Step 2: Convert to fraction form
   12,477.15/17,219.12 = 7,172.46/x
3. Step 3: Cross multiply
   12,477.15x = 17,219.12 × 7,172.46
4. Step 4: Simplify right side
   12,477.15x = 123,503,413.57
5. Step 5: Solve for x
   x = 123,503,413.57/12,477.15
6. Step 6: Final answer
   x = 9,898.37