Finding the Fourth Proportional to 21,238.86, 31,822.83 and 14,988.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,238.86 : 31,822.83 = 14,988.54 : x
2. Step 2: Convert to fraction form
   21,238.86/31,822.83 = 14,988.54/x
3. Step 3: Cross multiply
   21,238.86x = 31,822.83 × 14,988.54
4. Step 4: Simplify right side
   21,238.86x = 476,977,760.37
5. Step 5: Solve for x
   x = 476,977,760.37/21,238.86
6. Step 6: Final answer
   x = 22,457.79