Finding the Fourth Proportional to 13,023.59, 19,521.61 and 4,256.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,023.59 : 19,521.61 = 4,256.15 : x
2. Step 2: Convert to fraction form
   13,023.59/19,521.61 = 4,256.15/x
3. Step 3: Cross multiply
   13,023.59x = 19,521.61 × 4,256.15
4. Step 4: Simplify right side
   13,023.59x = 83,086,792.15
5. Step 5: Solve for x
   x = 83,086,792.15/13,023.59
6. Step 6: Final answer
   x = 6,379.72