Finding the Fourth Proportional to 17,089.60, 23,579.86 and 9,915.35

Step by Step Solution

1. Step 1: Write the proportion equation
   17,089.60 : 23,579.86 = 9,915.35 : x
2. Step 2: Convert to fraction form
   17,089.60/23,579.86 = 9,915.35/x
3. Step 3: Cross multiply
   17,089.60x = 23,579.86 × 9,915.35
4. Step 4: Simplify right side
   17,089.60x = 233,802,599.01
5. Step 5: Solve for x
   x = 233,802,599.01/17,089.60
6. Step 6: Final answer
   x = 13,680.99