Finding the Fourth Proportional to 2,915.82, 4,375.54 and 2,319.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,915.82 : 4,375.54 = 2,319.31 : x
2. Step 2: Convert to fraction form
   2,915.82/4,375.54 = 2,319.31/x
3. Step 3: Cross multiply
   2,915.82x = 4,375.54 × 2,319.31
4. Step 4: Simplify right side
   2,915.82x = 10,148,216.69
5. Step 5: Solve for x
   x = 10,148,216.69/2,915.82
6. Step 6: Final answer
   x = 3,480.40