Finding the Fourth Proportional to 2,157.54, 3,231.72 and 1,045.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.54 : 3,231.72 = 1,045.29 : x
2. Step 2: Convert to fraction form
   2,157.54/3,231.72 = 1,045.29/x
3. Step 3: Cross multiply
   2,157.54x = 3,231.72 × 1,045.29
4. Step 4: Simplify right side
   2,157.54x = 3,378,084.60
5. Step 5: Solve for x
   x = 3,378,084.60/2,157.54
6. Step 6: Final answer
   x = 1,565.71