Finding the Fourth Proportional to 9,861.91, 13,609.42 and 5,830.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.91 : 13,609.42 = 5,830.19 : x
2. Step 2: Convert to fraction form
   9,861.91/13,609.42 = 5,830.19/x
3. Step 3: Cross multiply
   9,861.91x = 13,609.42 × 5,830.19
4. Step 4: Simplify right side
   9,861.91x = 79,345,504.39
5. Step 5: Solve for x
   x = 79,345,504.39/9,861.91
6. Step 6: Final answer
   x = 8,045.65