Finding the Fourth Proportional to 2,130.82, 3,196.38 and 570.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.82 : 3,196.38 = 570.78 : x
2. Step 2: Convert to fraction form
   2,130.82/3,196.38 = 570.78/x
3. Step 3: Cross multiply
   2,130.82x = 3,196.38 × 570.78
4. Step 4: Simplify right side
   2,130.82x = 1,824,429.78
5. Step 5: Solve for x
   x = 1,824,429.78/2,130.82
6. Step 6: Final answer
   x = 856.21