Finding the Fourth Proportional to 21,303.24, 29,403.72 and 13,758

Step by Step Solution

1. Step 1: Write the proportion equation
   21,303.24 : 29,403.72 = 13,758 : x
2. Step 2: Convert to fraction form
   21,303.24/29,403.72 = 13,758/x
3. Step 3: Cross multiply
   21,303.24x = 29,403.72 × 13,758
4. Step 4: Simplify right side
   21,303.24x = 404,536,379.76
5. Step 5: Solve for x
   x = 404,536,379.76/21,303.24
6. Step 6: Final answer
   x = 18,989.43