Finding the Fourth Proportional to 13,311.59, 19,959.89 and 4,422.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.59 : 19,959.89 = 4,422.16 : x
2. Step 2: Convert to fraction form
   13,311.59/19,959.89 = 4,422.16/x
3. Step 3: Cross multiply
   13,311.59x = 19,959.89 × 4,422.16
4. Step 4: Simplify right side
   13,311.59x = 88,265,717.73
5. Step 5: Solve for x
   x = 88,265,717.73/13,311.59
6. Step 6: Final answer
   x = 6,630.74