Finding the Fourth Proportional to 11,869.56, 17,806.53 and 3,971.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,869.56 : 17,806.53 = 3,971.31 : x
2. Step 2: Convert to fraction form
   11,869.56/17,806.53 = 3,971.31/x
3. Step 3: Cross multiply
   11,869.56x = 17,806.53 × 3,971.31
4. Step 4: Simplify right side
   11,869.56x = 70,715,250.65
5. Step 5: Solve for x
   x = 70,715,250.65/11,869.56
6. Step 6: Final answer
   x = 5,957.70