Finding the Fourth Proportional to 21,054.72, 29,054.36 and 13,096.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.72 : 29,054.36 = 13,096.88 : x
2. Step 2: Convert to fraction form
   21,054.72/29,054.36 = 13,096.88/x
3. Step 3: Cross multiply
   21,054.72x = 29,054.36 × 13,096.88
4. Step 4: Simplify right side
   21,054.72x = 380,521,466.40
5. Step 5: Solve for x
   x = 380,521,466.40/21,054.72
6. Step 6: Final answer
   x = 18,072.98