Finding the Fourth Proportional to 21,055.37, 29,055.16 and 11,493.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,055.37 : 29,055.16 = 11,493.35 : x
2. Step 2: Convert to fraction form
   21,055.37/29,055.16 = 11,493.35/x
3. Step 3: Cross multiply
   21,055.37x = 29,055.16 × 11,493.35
4. Step 4: Simplify right side
   21,055.37x = 333,941,167.09
5. Step 5: Solve for x
   x = 333,941,167.09/21,055.37
6. Step 6: Final answer
   x = 15,860.15