Finding the Fourth Proportional to 11,961.21, 17,945.66 and 3,642.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,961.21 : 17,945.66 = 3,642.83 : x
2. Step 2: Convert to fraction form
   11,961.21/17,945.66 = 3,642.83/x
3. Step 3: Cross multiply
   11,961.21x = 17,945.66 × 3,642.83
4. Step 4: Simplify right side
   11,961.21x = 65,373,042.59
5. Step 5: Solve for x
   x = 65,373,042.59/11,961.21
6. Step 6: Final answer
   x = 5,465.42