Finding the Fourth Proportional to 17,085.57, 23,576.94 and 9,915.70

Step by Step Solution

1. Step 1: Write the proportion equation
   17,085.57 : 23,576.94 = 9,915.70 : x
2. Step 2: Convert to fraction form
   17,085.57/23,576.94 = 9,915.70/x
3. Step 3: Cross multiply
   17,085.57x = 23,576.94 × 9,915.70
4. Step 4: Simplify right side
   17,085.57x = 233,781,863.96
5. Step 5: Solve for x
   x = 233,781,863.96/17,085.57
6. Step 6: Final answer
   x = 13,683.00