Finding the Fourth Proportional to 2,128.45, 3,186.25 and 1,151.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.45 : 3,186.25 = 1,151.59 : x
2. Step 2: Convert to fraction form
   2,128.45/3,186.25 = 1,151.59/x
3. Step 3: Cross multiply
   2,128.45x = 3,186.25 × 1,151.59
4. Step 4: Simplify right side
   2,128.45x = 3,669,253.64
5. Step 5: Solve for x
   x = 3,669,253.64/2,128.45
6. Step 6: Final answer
   x = 1,723.91