Finding the Fourth Proportional to 3,528.63, 5,293.17 and 931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528.63 : 5,293.17 = 931.50 : x
2. Step 2: Convert to fraction form
   3,528.63/5,293.17 = 931.50/x
3. Step 3: Cross multiply
   3,528.63x = 5,293.17 × 931.50
4. Step 4: Simplify right side
   3,528.63x = 4,930,587.86
5. Step 5: Solve for x
   x = 4,930,587.86/3,528.63
6. Step 6: Final answer
   x = 1,397.31