Finding the Fourth Proportional to 2,381.32, 3,287.54 and 1,635.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,381.32 : 3,287.54 = 1,635.72 : x
2. Step 2: Convert to fraction form
   2,381.32/3,287.54 = 1,635.72/x
3. Step 3: Cross multiply
   2,381.32x = 3,287.54 × 1,635.72
4. Step 4: Simplify right side
   2,381.32x = 5,377,494.93
5. Step 5: Solve for x
   x = 5,377,494.93/2,381.32
6. Step 6: Final answer
   x = 2,258.20