Finding the Fourth Proportional to 11,870.64, 17,806.98 and 3,105.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.64 : 17,806.98 = 3,105.54 : x
2. Step 2: Convert to fraction form
   11,870.64/17,806.98 = 3,105.54/x
3. Step 3: Cross multiply
   11,870.64x = 17,806.98 × 3,105.54
4. Step 4: Simplify right side
   11,870.64x = 55,300,288.67
5. Step 5: Solve for x
   x = 55,300,288.67/11,870.64
6. Step 6: Final answer
   x = 4,658.58