Finding the Fourth Proportional to 2,214.63, 3,321.59 and 571.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,214.63 : 3,321.59 = 571.12 : x
2. Step 2: Convert to fraction form
   2,214.63/3,321.59 = 571.12/x
3. Step 3: Cross multiply
   2,214.63x = 3,321.59 × 571.12
4. Step 4: Simplify right side
   2,214.63x = 1,897,019.60
5. Step 5: Solve for x
   x = 1,897,019.60/2,214.63
6. Step 6: Final answer
   x = 856.59