Finding the Fourth Proportional to 2,352.27, 3,529.34 and 891.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,352.27 : 3,529.34 = 891.81 : x
2. Step 2: Convert to fraction form
   2,352.27/3,529.34 = 891.81/x
3. Step 3: Cross multiply
   2,352.27x = 3,529.34 × 891.81
4. Step 4: Simplify right side
   2,352.27x = 3,147,496.25
5. Step 5: Solve for x
   x = 3,147,496.25/2,352.27
6. Step 6: Final answer
   x = 1,338.07