Finding the Fourth Proportional to 9,863.92, 13,611.81 and 5,387.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,863.92 : 13,611.81 = 5,387.50 : x
2. Step 2: Convert to fraction form
   9,863.92/13,611.81 = 5,387.50/x
3. Step 3: Cross multiply
   9,863.92x = 13,611.81 × 5,387.50
4. Step 4: Simplify right side
   9,863.92x = 73,333,626.38
5. Step 5: Solve for x
   x = 73,333,626.38/9,863.92
6. Step 6: Final answer
   x = 7,434.53