Finding the Fourth Proportional to 21,300.57, 29,371.71 and 14,499

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.57 : 29,371.71 = 14,499 : x
2. Step 2: Convert to fraction form
   21,300.57/29,371.71 = 14,499/x
3. Step 3: Cross multiply
   21,300.57x = 29,371.71 × 14,499
4. Step 4: Simplify right side
   21,300.57x = 425,860,477.66
5. Step 5: Solve for x
   x = 425,860,477.66/21,300.57
6. Step 6: Final answer
   x = 19,992.91