Finding the Fourth Proportional to 2,837.68, 3,915.92 and 1,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,837.68 : 3,915.92 = 1,578.72 : x
2. Step 2: Convert to fraction form
   2,837.68/3,915.92 = 1,578.72/x
3. Step 3: Cross multiply
   2,837.68x = 3,915.92 × 1,578.72
4. Step 4: Simplify right side
   2,837.68x = 6,182,141.22
5. Step 5: Solve for x
   x = 6,182,141.22/2,837.68
6. Step 6: Final answer
   x = 2,178.59