Finding the Fourth Proportional to 17,258.56, 25,870.42 and 6,721.99

Step by Step Solution

1. Step 1: Write the proportion equation
   17,258.56 : 25,870.42 = 6,721.99 : x
2. Step 2: Convert to fraction form
   17,258.56/25,870.42 = 6,721.99/x
3. Step 3: Cross multiply
   17,258.56x = 25,870.42 × 6,721.99
4. Step 4: Simplify right side
   17,258.56x = 173,900,704.54
5. Step 5: Solve for x
   x = 173,900,704.54/17,258.56
6. Step 6: Final answer
   x = 10,076.20