Finding the Fourth Proportional to 1,036.05, 1,429.70 and 570.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.05 : 1,429.70 = 570.30 : x
2. Step 2: Convert to fraction form
   1,036.05/1,429.70 = 570.30/x
3. Step 3: Cross multiply
   1,036.05x = 1,429.70 × 570.30
4. Step 4: Simplify right side
   1,036.05x = 815,357.91
5. Step 5: Solve for x
   x = 815,357.91/1,036.05
6. Step 6: Final answer
   x = 786.99