Finding the Fourth Proportional to 1,037.32, 1,431.56 and 571.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,037.32 : 1,431.56 = 571.57 : x
2. Step 2: Convert to fraction form
   1,037.32/1,431.56 = 571.57/x
3. Step 3: Cross multiply
   1,037.32x = 1,431.56 × 571.57
4. Step 4: Simplify right side
   1,037.32x = 818,233.89
5. Step 5: Solve for x
   x = 818,233.89/1,037.32
6. Step 6: Final answer
   x = 788.80