Finding the Fourth Proportional to 12,019.63, 18,016.68 and 7,091.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,019.63 : 18,016.68 = 7,091.59 : x
2. Step 2: Convert to fraction form
   12,019.63/18,016.68 = 7,091.59/x
3. Step 3: Cross multiply
   12,019.63x = 18,016.68 × 7,091.59
4. Step 4: Simplify right side
   12,019.63x = 127,766,907.72
5. Step 5: Solve for x
   x = 127,766,907.72/12,019.63
6. Step 6: Final answer
   x = 10,629.85