Finding the Fourth Proportional to 5,321.50, 7,971.49 and 2,685.33

Step by Step Solution

1. Step 1: Write the proportion equation
   5,321.50 : 7,971.49 = 2,685.33 : x
2. Step 2: Convert to fraction form
   5,321.50/7,971.49 = 2,685.33/x
3. Step 3: Cross multiply
   5,321.50x = 7,971.49 × 2,685.33
4. Step 4: Simplify right side
   5,321.50x = 21,406,054.63
5. Step 5: Solve for x
   x = 21,406,054.63/5,321.50
6. Step 6: Final answer
   x = 4,022.56