Finding the Fourth Proportional to 13,609.98, 20,402.01 and 4,369.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,609.98 : 20,402.01 = 4,369.50 : x
2. Step 2: Convert to fraction form
   13,609.98/20,402.01 = 4,369.50/x
3. Step 3: Cross multiply
   13,609.98x = 20,402.01 × 4,369.50
4. Step 4: Simplify right side
   13,609.98x = 89,146,582.70
5. Step 5: Solve for x
   x = 89,146,582.70/13,609.98
6. Step 6: Final answer
   x = 6,550.09