Finding the Fourth Proportional to 2,128.37, 3,185.96 and 1,152.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.37 : 3,185.96 = 1,152.05 : x
2. Step 2: Convert to fraction form
   2,128.37/3,185.96 = 1,152.05/x
3. Step 3: Cross multiply
   2,128.37x = 3,185.96 × 1,152.05
4. Step 4: Simplify right side
   2,128.37x = 3,670,379.46
5. Step 5: Solve for x
   x = 3,670,379.46/2,128.37
6. Step 6: Final answer
   x = 1,724.50