Finding the Fourth Proportional to 9,858.79, 13,605.06 and 5,382.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.79 : 13,605.06 = 5,382.54 : x
2. Step 2: Convert to fraction form
   9,858.79/13,605.06 = 5,382.54/x
3. Step 3: Cross multiply
   9,858.79x = 13,605.06 × 5,382.54
4. Step 4: Simplify right side
   9,858.79x = 73,229,799.84
5. Step 5: Solve for x
   x = 73,229,799.84/9,858.79
6. Step 6: Final answer
   x = 7,427.87