Finding the Fourth Proportional to 3,528.56, 5,293.15 and 931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528.56 : 5,293.15 = 931.50 : x
2. Step 2: Convert to fraction form
   3,528.56/5,293.15 = 931.50/x
3. Step 3: Cross multiply
   3,528.56x = 5,293.15 × 931.50
4. Step 4: Simplify right side
   3,528.56x = 4,930,566.90
5. Step 5: Solve for x
   x = 4,930,566.90/3,528.56
6. Step 6: Final answer
   x = 1,397.33