Finding the Fourth Proportional to 1,023.60, 1,532.94 and 528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,023.60 : 1,532.94 = 528.72 : x
2. Step 2: Convert to fraction form
   1,023.60/1,532.94 = 528.72/x
3. Step 3: Cross multiply
   1,023.60x = 1,532.94 × 528.72
4. Step 4: Simplify right side
   1,023.60x = 810,496.04
5. Step 5: Solve for x
   x = 810,496.04/1,023.60
6. Step 6: Final answer
   x = 791.81