Finding the Fourth Proportional to 16,510.23, 22,816.89 and 13,521.33

Step by Step Solution

1. Step 1: Write the proportion equation
   16,510.23 : 22,816.89 = 13,521.33 : x
2. Step 2: Convert to fraction form
   16,510.23/22,816.89 = 13,521.33/x
3. Step 3: Cross multiply
   16,510.23x = 22,816.89 × 13,521.33
4. Step 4: Simplify right side
   16,510.23x = 308,514,699.26
5. Step 5: Solve for x
   x = 308,514,699.26/16,510.23
6. Step 6: Final answer
   x = 18,686.28