Finding the Fourth Proportional to 13,056.72, 19,474.86 and 11,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,056.72 : 19,474.86 = 11,086.80 : x
2. Step 2: Convert to fraction form
   13,056.72/19,474.86 = 11,086.80/x
3. Step 3: Cross multiply
   13,056.72x = 19,474.86 × 11,086.80
4. Step 4: Simplify right side
   13,056.72x = 215,913,877.85
5. Step 5: Solve for x
   x = 215,913,877.85/13,056.72
6. Step 6: Final answer
   x = 16,536.61