Finding the Fourth Proportional to 17,278.64, 23,856 and 13,292.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,278.64 : 23,856 = 13,292.72 : x
2. Step 2: Convert to fraction form
   17,278.64/23,856 = 13,292.72/x
3. Step 3: Cross multiply
   17,278.64x = 23,856 × 13,292.72
4. Step 4: Simplify right side
   17,278.64x = 317,111,128.32
5. Step 5: Solve for x
   x = 317,111,128.32/17,278.64
6. Step 6: Final answer
   x = 18,352.78