Finding the Fourth Proportional to 21,377.27, 29,511 and 15,017.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,377.27 : 29,511 = 15,017.37 : x
2. Step 2: Convert to fraction form
   21,377.27/29,511 = 15,017.37/x
3. Step 3: Cross multiply
   21,377.27x = 29,511 × 15,017.37
4. Step 4: Simplify right side
   21,377.27x = 443,177,606.07
5. Step 5: Solve for x
   x = 443,177,606.07/21,377.27
6. Step 6: Final answer
   x = 20,731.26