Finding the Fourth Proportional to 9,436.30, 13,022.07 and 5,187.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.30 : 13,022.07 = 5,187.63 : x
2. Step 2: Convert to fraction form
   9,436.30/13,022.07 = 5,187.63/x
3. Step 3: Cross multiply
   9,436.30x = 13,022.07 × 5,187.63
4. Step 4: Simplify right side
   9,436.30x = 67,553,628.85
5. Step 5: Solve for x
   x = 67,553,628.85/9,436.30
6. Step 6: Final answer
   x = 7,158.91