Finding the Fourth Proportional to 1,023.69, 1,532.52 and 528.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,023.69 : 1,532.52 = 528.90 : x
2. Step 2: Convert to fraction form
   1,023.69/1,532.52 = 528.90/x
3. Step 3: Cross multiply
   1,023.69x = 1,532.52 × 528.90
4. Step 4: Simplify right side
   1,023.69x = 810,557.01
5. Step 5: Solve for x
   x = 810,557.01/1,023.69
6. Step 6: Final answer
   x = 791.80