Finding the Fourth Proportional to 9,436.31, 13,021.25 and 5,187.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.31 : 13,021.25 = 5,187.33 : x
2. Step 2: Convert to fraction form
   9,436.31/13,021.25 = 5,187.33/x
3. Step 3: Cross multiply
   9,436.31x = 13,021.25 × 5,187.33
4. Step 4: Simplify right side
   9,436.31x = 67,545,494.83
5. Step 5: Solve for x
   x = 67,545,494.83/9,436.31
6. Step 6: Final answer
   x = 7,158.04