Finding the Fourth Proportional to 1,037.31, 1,431.49 and 571.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,037.31 : 1,431.49 = 571.56 : x
2. Step 2: Convert to fraction form
   1,037.31/1,431.49 = 571.56/x
3. Step 3: Cross multiply
   1,037.31x = 1,431.49 × 571.56
4. Step 4: Simplify right side
   1,037.31x = 818,182.42
5. Step 5: Solve for x
   x = 818,182.42/1,037.31
6. Step 6: Final answer
   x = 788.75