Finding the Fourth Proportional to 11,805.78, 17,704.18 and 3,905.93

Step by Step Solution

1. Step 1: Write the proportion equation
   11,805.78 : 17,704.18 = 3,905.93 : x
2. Step 2: Convert to fraction form
   11,805.78/17,704.18 = 3,905.93/x
3. Step 3: Cross multiply
   11,805.78x = 17,704.18 × 3,905.93
4. Step 4: Simplify right side
   11,805.78x = 69,151,287.79
5. Step 5: Solve for x
   x = 69,151,287.79/11,805.78
6. Step 6: Final answer
   x = 5,857.41