Finding the Fourth Proportional to 1,015.63, 1,401.59 and 573.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.63 : 1,401.59 = 573.64 : x
2. Step 2: Convert to fraction form
   1,015.63/1,401.59 = 573.64/x
3. Step 3: Cross multiply
   1,015.63x = 1,401.59 × 573.64
4. Step 4: Simplify right side
   1,015.63x = 804,008.09
5. Step 5: Solve for x
   x = 804,008.09/1,015.63
6. Step 6: Final answer
   x = 791.63