Finding the Fourth Proportional to 9,889.15, 14,831.38 and 2,867.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,889.15 : 14,831.38 = 2,867.31 : x
2. Step 2: Convert to fraction form
   9,889.15/14,831.38 = 2,867.31/x
3. Step 3: Cross multiply
   9,889.15x = 14,831.38 × 2,867.31
4. Step 4: Simplify right side
   9,889.15x = 42,526,164.19
5. Step 5: Solve for x
   x = 42,526,164.19/9,889.15
6. Step 6: Final answer
   x = 4,300.29