Finding the Fourth Proportional to 17,290.10, 25,916.52 and 8,386.58

Step by Step Solution

1. Step 1: Write the proportion equation
   17,290.10 : 25,916.52 = 8,386.58 : x
2. Step 2: Convert to fraction form
   17,290.10/25,916.52 = 8,386.58/x
3. Step 3: Cross multiply
   17,290.10x = 25,916.52 × 8,386.58
4. Step 4: Simplify right side
   17,290.10x = 217,350,968.30
5. Step 5: Solve for x
   x = 217,350,968.30/17,290.10
6. Step 6: Final answer
   x = 12,570.83