Finding the Fourth Proportional to 21,056.37, 29,056.54 and 11,494.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,056.37 : 29,056.54 = 11,494.35 : x
2. Step 2: Convert to fraction form
   21,056.37/29,056.54 = 11,494.35/x
3. Step 3: Cross multiply
   21,056.37x = 29,056.54 × 11,494.35
4. Step 4: Simplify right side
   21,056.37x = 333,986,040.55
5. Step 5: Solve for x
   x = 333,986,040.55/21,056.37
6. Step 6: Final answer
   x = 15,861.52