Finding the Fourth Proportional to 14,258.76, 21,382.69 and 5,707.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,258.76 : 21,382.69 = 5,707.59 : x
2. Step 2: Convert to fraction form
   14,258.76/21,382.69 = 5,707.59/x
3. Step 3: Cross multiply
   14,258.76x = 21,382.69 × 5,707.59
4. Step 4: Simplify right side
   14,258.76x = 122,043,627.62
5. Step 5: Solve for x
   x = 122,043,627.62/14,258.76
6. Step 6: Final answer
   x = 8,559.20