Finding the Fourth Proportional to 9,869.94, 13,618.80 and 5,890.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.94 : 13,618.80 = 5,890.82 : x
2. Step 2: Convert to fraction form
   9,869.94/13,618.80 = 5,890.82/x
3. Step 3: Cross multiply
   9,869.94x = 13,618.80 × 5,890.82
4. Step 4: Simplify right side
   9,869.94x = 80,225,831.32
5. Step 5: Solve for x
   x = 80,225,831.32/9,869.94
6. Step 6: Final answer
   x = 8,128.30