Finding the Fourth Proportional to 9,858.69, 13,604.90 and 5,382.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.69 : 13,604.90 = 5,382.59 : x
2. Step 2: Convert to fraction form
   9,858.69/13,604.90 = 5,382.59/x
3. Step 3: Cross multiply
   9,858.69x = 13,604.90 × 5,382.59
4. Step 4: Simplify right side
   9,858.69x = 73,229,503.75
5. Step 5: Solve for x
   x = 73,229,503.75/9,858.69
6. Step 6: Final answer
   x = 7,427.91