Finding the Fourth Proportional to 10,399.98, 15,590.13 and 3,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,399.98 : 15,590.13 = 3,469.50 : x
2. Step 2: Convert to fraction form
   10,399.98/15,590.13 = 3,469.50/x
3. Step 3: Cross multiply
   10,399.98x = 15,590.13 × 3,469.50
4. Step 4: Simplify right side
   10,399.98x = 54,089,956.04
5. Step 5: Solve for x
   x = 54,089,956.04/10,399.98
6. Step 6: Final answer
   x = 5,200.97