Finding the Fourth Proportional to 2,145.75, 2,961.39 and 1,201.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.75 : 2,961.39 = 1,201.69 : x
2. Step 2: Convert to fraction form
   2,145.75/2,961.39 = 1,201.69/x
3. Step 3: Cross multiply
   2,145.75x = 2,961.39 × 1,201.69
4. Step 4: Simplify right side
   2,145.75x = 3,558,672.75
5. Step 5: Solve for x
   x = 3,558,672.75/2,145.75
6. Step 6: Final answer
   x = 1,658.48