Finding the Fourth Proportional to 2,353.50, 3,531.69 and 985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,353.50 : 3,531.69 = 985.50 : x
2. Step 2: Convert to fraction form
   2,353.50/3,531.69 = 985.50/x
3. Step 3: Cross multiply
   2,353.50x = 3,531.69 × 985.50
4. Step 4: Simplify right side
   2,353.50x = 3,480,480.50
5. Step 5: Solve for x
   x = 3,480,480.50/2,353.50
6. Step 6: Final answer
   x = 1,478.85