Finding the Fourth Proportional to 1,015.59, 1,401.72 and 573.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.59 : 1,401.72 = 573.63 : x
2. Step 2: Convert to fraction form
   1,015.59/1,401.72 = 573.63/x
3. Step 3: Cross multiply
   1,015.59x = 1,401.72 × 573.63
4. Step 4: Simplify right side
   1,015.59x = 804,068.64
5. Step 5: Solve for x
   x = 804,068.64/1,015.59
6. Step 6: Final answer
   x = 791.73