Finding the Fourth Proportional to 2,377.57, 3,280.80 and 1,315.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,377.57 : 3,280.80 = 1,315.17 : x
2. Step 2: Convert to fraction form
   2,377.57/3,280.80 = 1,315.17/x
3. Step 3: Cross multiply
   2,377.57x = 3,280.80 × 1,315.17
4. Step 4: Simplify right side
   2,377.57x = 4,314,804.80
5. Step 5: Solve for x
   x = 4,314,804.80/2,377.57
6. Step 6: Final answer
   x = 1,814.80