Finding the Fourth Proportional to 9,865.35, 13,614.57 and 5,389.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,865.35 : 13,614.57 = 5,389.56 : x
2. Step 2: Convert to fraction form
   9,865.35/13,614.57 = 5,389.56/x
3. Step 3: Cross multiply
   9,865.35x = 13,614.57 × 5,389.56
4. Step 4: Simplify right side
   9,865.35x = 73,376,541.89
5. Step 5: Solve for x
   x = 73,376,541.89/9,865.35
6. Step 6: Final answer
   x = 7,437.80