Finding the Fourth Proportional to 2,131.52, 3,190.05 and 1,310.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.52 : 3,190.05 = 1,310.31 : x
2. Step 2: Convert to fraction form
   2,131.52/3,190.05 = 1,310.31/x
3. Step 3: Cross multiply
   2,131.52x = 3,190.05 × 1,310.31
4. Step 4: Simplify right side
   2,131.52x = 4,179,954.42
5. Step 5: Solve for x
   x = 4,179,954.42/2,131.52
6. Step 6: Final answer
   x = 1,961.03