Finding the Fourth Proportional to 9,863.51, 13,611.56 and 5,387.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,863.51 : 13,611.56 = 5,387.25 : x
2. Step 2: Convert to fraction form
   9,863.51/13,611.56 = 5,387.25/x
3. Step 3: Cross multiply
   9,863.51x = 13,611.56 × 5,387.25
4. Step 4: Simplify right side
   9,863.51x = 73,328,849.67
5. Step 5: Solve for x
   x = 73,328,849.67/9,863.51
6. Step 6: Final answer
   x = 7,434.36