Finding the Fourth Proportional to 2,145.72, 2,961.23 and 1,201.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.72 : 2,961.23 = 1,201.59 : x
2. Step 2: Convert to fraction form
   2,145.72/2,961.23 = 1,201.59/x
3. Step 3: Cross multiply
   2,145.72x = 2,961.23 × 1,201.59
4. Step 4: Simplify right side
   2,145.72x = 3,558,184.36
5. Step 5: Solve for x
   x = 3,558,184.36/2,145.72
6. Step 6: Final answer
   x = 1,658.27