Finding the Fourth Proportional to 2,051.58, 3,077.31 and 570.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.58 : 3,077.31 = 570.80 : x
2. Step 2: Convert to fraction form
   2,051.58/3,077.31 = 570.80/x
3. Step 3: Cross multiply
   2,051.58x = 3,077.31 × 570.80
4. Step 4: Simplify right side
   2,051.58x = 1,756,513.16
5. Step 5: Solve for x
   x = 1,756,513.16/2,051.58
6. Step 6: Final answer
   x = 856.18