Finding the Fourth Proportional to 9,864.96, 13,613.67 and 5,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.96 : 13,613.67 = 5,388.72 : x
2. Step 2: Convert to fraction form
   9,864.96/13,613.67 = 5,388.72/x
3. Step 3: Cross multiply
   9,864.96x = 13,613.67 × 5,388.72
4. Step 4: Simplify right side
   9,864.96x = 73,360,255.80
5. Step 5: Solve for x
   x = 73,360,255.80/9,864.96
6. Step 6: Final answer
   x = 7,436.45