Finding the Fourth Proportional to 1,037.49, 1,431.72 and 571.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,037.49 : 1,431.72 = 571.74 : x
2. Step 2: Convert to fraction form
   1,037.49/1,431.72 = 571.74/x
3. Step 3: Cross multiply
   1,037.49x = 1,431.72 × 571.74
4. Step 4: Simplify right side
   1,037.49x = 818,571.59
5. Step 5: Solve for x
   x = 818,571.59/1,037.49
6. Step 6: Final answer
   x = 788.99