Finding the Fourth Proportional to 2,145.38, 2,960.35 and 1,201.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.38 : 2,960.35 = 1,201.21 : x
2. Step 2: Convert to fraction form
   2,145.38/2,960.35 = 1,201.21/x
3. Step 3: Cross multiply
   2,145.38x = 2,960.35 × 1,201.21
4. Step 4: Simplify right side
   2,145.38x = 3,556,002.02
5. Step 5: Solve for x
   x = 3,556,002.02/2,145.38
6. Step 6: Final answer
   x = 1,657.52