Finding the Fourth Proportional to 12,055.20, 16,635.69 and 7,019.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,055.20 : 16,635.69 = 7,019.57 : x
2. Step 2: Convert to fraction form
   12,055.20/16,635.69 = 7,019.57/x
3. Step 3: Cross multiply
   12,055.20x = 16,635.69 × 7,019.57
4. Step 4: Simplify right side
   12,055.20x = 116,775,390.45
5. Step 5: Solve for x
   x = 116,775,390.45/12,055.20
6. Step 6: Final answer
   x = 9,686.72