Finding the Fourth Proportional to 9,436.71, 13,021.86 and 5,187.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.71 : 13,021.86 = 5,187.54 : x
2. Step 2: Convert to fraction form
   9,436.71/13,021.86 = 5,187.54/x
3. Step 3: Cross multiply
   9,436.71x = 13,021.86 × 5,187.54
4. Step 4: Simplify right side
   9,436.71x = 67,551,419.62
5. Step 5: Solve for x
   x = 67,551,419.62/9,436.71
6. Step 6: Final answer
   x = 7,158.37