Finding the Fourth Proportional to 1,036.28, 1,430.04 and 570.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.28 : 1,430.04 = 570.50 : x
2. Step 2: Convert to fraction form
   1,036.28/1,430.04 = 570.50/x
3. Step 3: Cross multiply
   1,036.28x = 1,430.04 × 570.50
4. Step 4: Simplify right side
   1,036.28x = 815,837.82
5. Step 5: Solve for x
   x = 815,837.82/1,036.28
6. Step 6: Final answer
   x = 787.28