Finding the Fourth Proportional to 13,661.69, 20,499.21 and 4,900.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,661.69 : 20,499.21 = 4,900.73 : x
2. Step 2: Convert to fraction form
   13,661.69/20,499.21 = 4,900.73/x
3. Step 3: Cross multiply
   13,661.69x = 20,499.21 × 4,900.73
4. Step 4: Simplify right side
   13,661.69x = 100,460,990.93
5. Step 5: Solve for x
   x = 100,460,990.93/13,661.69
6. Step 6: Final answer
   x = 7,353.48