Finding the Fourth Proportional to 9,867.07, 13,615.06 and 5,618.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,867.07 : 13,615.06 = 5,618.31 : x
2. Step 2: Convert to fraction form
   9,867.07/13,615.06 = 5,618.31/x
3. Step 3: Cross multiply
   9,867.07x = 13,615.06 × 5,618.31
4. Step 4: Simplify right side
   9,867.07x = 76,493,613.70
5. Step 5: Solve for x
   x = 76,493,613.70/9,867.07
6. Step 6: Final answer
   x = 7,752.41