Finding the Fourth Proportional to 9,864.66, 13,613.01 and 5,388.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.66 : 13,613.01 = 5,388.42 : x
2. Step 2: Convert to fraction form
   9,864.66/13,613.01 = 5,388.42/x
3. Step 3: Cross multiply
   9,864.66x = 13,613.01 × 5,388.42
4. Step 4: Simplify right side
   9,864.66x = 73,352,615.34
5. Step 5: Solve for x
   x = 73,352,615.34/9,864.66
6. Step 6: Final answer
   x = 7,435.90