Finding the Fourth Proportional to 14,365.18, 21,650.89 and 13,561.48

Step by Step Solution

1. Step 1: Write the proportion equation
   14,365.18 : 21,650.89 = 13,561.48 : x
2. Step 2: Convert to fraction form
   14,365.18/21,650.89 = 13,561.48/x
3. Step 3: Cross multiply
   14,365.18x = 21,650.89 × 13,561.48
4. Step 4: Simplify right side
   14,365.18x = 293,618,111.72
5. Step 5: Solve for x
   x = 293,618,111.72/14,365.18
6. Step 6: Final answer
   x = 20,439.57