Finding the Fourth Proportional to 21,123.01, 31,661.73 and 13,732.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.01 : 31,661.73 = 13,732.77 : x
2. Step 2: Convert to fraction form
   21,123.01/31,661.73 = 13,732.77/x
3. Step 3: Cross multiply
   21,123.01x = 31,661.73 × 13,732.77
4. Step 4: Simplify right side
   21,123.01x = 434,803,255.89
5. Step 5: Solve for x
   x = 434,803,255.89/21,123.01
6. Step 6: Final answer
   x = 20,584.34