Finding the Fourth Proportional to 11,870.42, 17,806.64 and 3,105.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.42 : 17,806.64 = 3,105.32 : x
2. Step 2: Convert to fraction form
   11,870.42/17,806.64 = 3,105.32/x
3. Step 3: Cross multiply
   11,870.42x = 17,806.64 × 3,105.32
4. Step 4: Simplify right side
   11,870.42x = 55,295,323.09
5. Step 5: Solve for x
   x = 55,295,323.09/11,870.42
6. Step 6: Final answer
   x = 4,658.24