Finding the Fourth Proportional to 10,889.25, 16,302.89 and 7,180.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,889.25 : 16,302.89 = 7,180.16 : x
2. Step 2: Convert to fraction form
   10,889.25/16,302.89 = 7,180.16/x
3. Step 3: Cross multiply
   10,889.25x = 16,302.89 × 7,180.16
4. Step 4: Simplify right side
   10,889.25x = 117,057,241.25
5. Step 5: Solve for x
   x = 117,057,241.25/10,889.25
6. Step 6: Final answer
   x = 10,749.80