Finding the Fourth Proportional to 1,015.69, 1,401.64 and 573.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.69 : 1,401.64 = 573.58 : x
2. Step 2: Convert to fraction form
   1,015.69/1,401.64 = 573.58/x
3. Step 3: Cross multiply
   1,015.69x = 1,401.64 × 573.58
4. Step 4: Simplify right side
   1,015.69x = 803,950.60
5. Step 5: Solve for x
   x = 803,950.60/1,015.69
6. Step 6: Final answer
   x = 791.54