Finding the Fourth Proportional to 9,889.82, 13,643.61 and 5,908.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,889.82 : 13,643.61 = 5,908.94 : x
2. Step 2: Convert to fraction form
   9,889.82/13,643.61 = 5,908.94/x
3. Step 3: Cross multiply
   9,889.82x = 13,643.61 × 5,908.94
4. Step 4: Simplify right side
   9,889.82x = 80,619,272.87
5. Step 5: Solve for x
   x = 80,619,272.87/9,889.82
6. Step 6: Final answer
   x = 8,151.74