Finding the Fourth Proportional to 2,697.91, 3,722.61 and 1,578.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,697.91 : 3,722.61 = 1,578.89 : x
2. Step 2: Convert to fraction form
   2,697.91/3,722.61 = 1,578.89/x
3. Step 3: Cross multiply
   2,697.91x = 3,722.61 × 1,578.89
4. Step 4: Simplify right side
   2,697.91x = 5,877,598.05
5. Step 5: Solve for x
   x = 5,877,598.05/2,697.91
6. Step 6: Final answer
   x = 2,178.58