Finding the Fourth Proportional to 1,038.81, 1,433.56 and 573.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.81 : 1,433.56 = 573.06 : x
2. Step 2: Convert to fraction form
   1,038.81/1,433.56 = 573.06/x
3. Step 3: Cross multiply
   1,038.81x = 1,433.56 × 573.06
4. Step 4: Simplify right side
   1,038.81x = 821,515.89
5. Step 5: Solve for x
   x = 821,515.89/1,038.81
6. Step 6: Final answer
   x = 790.82