Finding the Fourth Proportional to 17,089.42, 23,585.53 and 9,917.80

Step by Step Solution

1. Step 1: Write the proportion equation
   17,089.42 : 23,585.53 = 9,917.80 : x
2. Step 2: Convert to fraction form
   17,089.42/23,585.53 = 9,917.80/x
3. Step 3: Cross multiply
   17,089.42x = 23,585.53 × 9,917.80
4. Step 4: Simplify right side
   17,089.42x = 233,916,569.43
5. Step 5: Solve for x
   x = 233,916,569.43/17,089.42
6. Step 6: Final answer
   x = 13,687.80