Finding the Fourth Proportional to 11,807.78, 17,707.18 and 3,907.93

Step by Step Solution

1. Step 1: Write the proportion equation
   11,807.78 : 17,707.18 = 3,907.93 : x
2. Step 2: Convert to fraction form
   11,807.78/17,707.18 = 3,907.93/x
3. Step 3: Cross multiply
   11,807.78x = 17,707.18 × 3,907.93
4. Step 4: Simplify right side
   11,807.78x = 69,198,419.94
5. Step 5: Solve for x
   x = 69,198,419.94/11,807.78
6. Step 6: Final answer
   x = 5,860.41