Finding the Fourth Proportional to 17,091.51, 23,588.40 and 9,919.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,091.51 : 23,588.40 = 9,919.89 : x
2. Step 2: Convert to fraction form
   17,091.51/23,588.40 = 9,919.89/x
3. Step 3: Cross multiply
   17,091.51x = 23,588.40 × 9,919.89
4. Step 4: Simplify right side
   17,091.51x = 233,994,333.28
5. Step 5: Solve for x
   x = 233,994,333.28/17,091.51
6. Step 6: Final answer
   x = 13,690.68