Finding the Fourth Proportional to 2,353.52, 3,528.09 and 891.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,353.52 : 3,528.09 = 891.69 : x
2. Step 2: Convert to fraction form
   2,353.52/3,528.09 = 891.69/x
3. Step 3: Cross multiply
   2,353.52x = 3,528.09 × 891.69
4. Step 4: Simplify right side
   2,353.52x = 3,145,962.57
5. Step 5: Solve for x
   x = 3,145,962.57/2,353.52
6. Step 6: Final answer
   x = 1,336.71