Finding the Fourth Proportional to 1,036.57, 1,430.46 and 570.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.57 : 1,430.46 = 570.82 : x
2. Step 2: Convert to fraction form
   1,036.57/1,430.46 = 570.82/x
3. Step 3: Cross multiply
   1,036.57x = 1,430.46 × 570.82
4. Step 4: Simplify right side
   1,036.57x = 816,535.18
5. Step 5: Solve for x
   x = 816,535.18/1,036.57
6. Step 6: Final answer
   x = 787.73