Finding the Fourth Proportional to 9,866.15, 13,614.71 and 5,389.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,866.15 : 13,614.71 = 5,389.01 : x
2. Step 2: Convert to fraction form
   9,866.15/13,614.71 = 5,389.01/x
3. Step 3: Cross multiply
   9,866.15x = 13,614.71 × 5,389.01
4. Step 4: Simplify right side
   9,866.15x = 73,369,781.39
5. Step 5: Solve for x
   x = 73,369,781.39/9,866.15
6. Step 6: Final answer
   x = 7,436.52