Finding the Fourth Proportional to 1,015.70, 1,401.72 and 573.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.70 : 1,401.72 = 573.62 : x
2. Step 2: Convert to fraction form
   1,015.70/1,401.72 = 573.62/x
3. Step 3: Cross multiply
   1,015.70x = 1,401.72 × 573.62
4. Step 4: Simplify right side
   1,015.70x = 804,054.63
5. Step 5: Solve for x
   x = 804,054.63/1,015.70
6. Step 6: Final answer
   x = 791.63