Finding the Fourth Proportional to 2,309.61, 3,187.21 and 1,301.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.61 : 3,187.21 = 1,301.31 : x
2. Step 2: Convert to fraction form
   2,309.61/3,187.21 = 1,301.31/x
3. Step 3: Cross multiply
   2,309.61x = 3,187.21 × 1,301.31
4. Step 4: Simplify right side
   2,309.61x = 4,147,548.25
5. Step 5: Solve for x
   x = 4,147,548.25/2,309.61
6. Step 6: Final answer
   x = 1,795.78