Finding the Fourth Proportional to 11,961.42, 16,505.00 and 7,180.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,961.42 : 16,505.00 = 7,180.35 : x
2. Step 2: Convert to fraction form
   11,961.42/16,505.00 = 7,180.35/x
3. Step 3: Cross multiply
   11,961.42x = 16,505.00 × 7,180.35
4. Step 4: Simplify right side
   11,961.42x = 118,511,640.85
5. Step 5: Solve for x
   x = 118,511,640.85/11,961.42
6. Step 6: Final answer
   x = 9,907.82