Finding the Fourth Proportional to 1,035.31, 1,428.81 and 569.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,035.31 : 1,428.81 = 569.56 : x
2. Step 2: Convert to fraction form
   1,035.31/1,428.81 = 569.56/x
3. Step 3: Cross multiply
   1,035.31x = 1,428.81 × 569.56
4. Step 4: Simplify right side
   1,035.31x = 813,793.02
5. Step 5: Solve for x
   x = 813,793.02/1,035.31
6. Step 6: Final answer
   x = 786.04