Finding the Fourth Proportional to 2,820.94, 3,892.89 and 1,578.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.94 : 3,892.89 = 1,578.94 : x
2. Step 2: Convert to fraction form
   2,820.94/3,892.89 = 1,578.94/x
3. Step 3: Cross multiply
   2,820.94x = 3,892.89 × 1,578.94
4. Step 4: Simplify right side
   2,820.94x = 6,146,635.93
5. Step 5: Solve for x
   x = 6,146,635.93/2,820.94
6. Step 6: Final answer
   x = 2,178.93