Finding the Fourth Proportional to 2,615.98, 3,920.73 and 1,317.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.98 : 3,920.73 = 1,317.82 : x
2. Step 2: Convert to fraction form
   2,615.98/3,920.73 = 1,317.82/x
3. Step 3: Cross multiply
   2,615.98x = 3,920.73 × 1,317.82
4. Step 4: Simplify right side
   2,615.98x = 5,166,816.41
5. Step 5: Solve for x
   x = 5,166,816.41/2,615.98
6. Step 6: Final answer
   x = 1,975.10