Finding the Fourth Proportional to 16,880.76, 25,328.34 and 13,016.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,880.76 : 25,328.34 = 13,016.76 : x
2. Step 2: Convert to fraction form
   16,880.76/25,328.34 = 13,016.76/x
3. Step 3: Cross multiply
   16,880.76x = 25,328.34 × 13,016.76
4. Step 4: Simplify right side
   16,880.76x = 329,692,922.98
5. Step 5: Solve for x
   x = 329,692,922.98/16,880.76
6. Step 6: Final answer
   x = 19,530.69