Finding the Fourth Proportional to 9,865.82, 13,615.10 and 5,389.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,865.82 : 13,615.10 = 5,389.82 : x
2. Step 2: Convert to fraction form
   9,865.82/13,615.10 = 5,389.82/x
3. Step 3: Cross multiply
   9,865.82x = 13,615.10 × 5,389.82
4. Step 4: Simplify right side
   9,865.82x = 73,382,883.81
5. Step 5: Solve for x
   x = 73,382,883.81/9,865.82
6. Step 6: Final answer
   x = 7,438.09