Finding the Fourth Proportional to 11,923.74, 17,891.69 and 9,019.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,923.74 : 17,891.69 = 9,019.89 : x
2. Step 2: Convert to fraction form
   11,923.74/17,891.69 = 9,019.89/x
3. Step 3: Cross multiply
   11,923.74x = 17,891.69 × 9,019.89
4. Step 4: Simplify right side
   11,923.74x = 161,381,030.61
5. Step 5: Solve for x
   x = 161,381,030.61/11,923.74
6. Step 6: Final answer
   x = 13,534.43