Finding the Fourth Proportional to 9,869.82, 13,618.63 and 5,890.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.82 : 13,618.63 = 5,890.69 : x
2. Step 2: Convert to fraction form
   9,869.82/13,618.63 = 5,890.69/x
3. Step 3: Cross multiply
   9,869.82x = 13,618.63 × 5,890.69
4. Step 4: Simplify right side
   9,869.82x = 80,223,127.55
5. Step 5: Solve for x
   x = 80,223,127.55/9,869.82
6. Step 6: Final answer
   x = 8,128.12