Finding the Fourth Proportional to 11,680.35, 16,118.78 and 7,202.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,680.35 : 16,118.78 = 7,202.31 : x
2. Step 2: Convert to fraction form
   11,680.35/16,118.78 = 7,202.31/x
3. Step 3: Cross multiply
   11,680.35x = 16,118.78 × 7,202.31
4. Step 4: Simplify right side
   11,680.35x = 116,092,414.37
5. Step 5: Solve for x
   x = 116,092,414.37/11,680.35
6. Step 6: Final answer
   x = 9,939.12