Finding the Fourth Proportional to 2,072.86, 2,856.72 and 1,757.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.86 : 2,856.72 = 1,757.12 : x
2. Step 2: Convert to fraction form
   2,072.86/2,856.72 = 1,757.12/x
3. Step 3: Cross multiply
   2,072.86x = 2,856.72 × 1,757.12
4. Step 4: Simplify right side
   2,072.86x = 5,019,599.85
5. Step 5: Solve for x
   x = 5,019,599.85/2,072.86
6. Step 6: Final answer
   x = 2,421.58