Finding the Fourth Proportional to 2,372.80, 3,274.43 and 1,310.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,372.80 : 3,274.43 = 1,310.61 : x
2. Step 2: Convert to fraction form
   2,372.80/3,274.43 = 1,310.61/x
3. Step 3: Cross multiply
   2,372.80x = 3,274.43 × 1,310.61
4. Step 4: Simplify right side
   2,372.80x = 4,291,487.61
5. Step 5: Solve for x
   x = 4,291,487.61/2,372.80
6. Step 6: Final answer
   x = 1,808.62