Finding the Fourth Proportional to 11,659.76, 17,490.72 and 3,869.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,659.76 : 17,490.72 = 3,869.18 : x
2. Step 2: Convert to fraction form
   11,659.76/17,490.72 = 3,869.18/x
3. Step 3: Cross multiply
   11,659.76x = 17,490.72 × 3,869.18
4. Step 4: Simplify right side
   11,659.76x = 67,674,744.01
5. Step 5: Solve for x
   x = 67,674,744.01/11,659.76
6. Step 6: Final answer
   x = 5,804.13