Finding the Fourth Proportional to 2,145.48, 2,961.38 and 1,261.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.48 : 2,961.38 = 1,261.32 : x
2. Step 2: Convert to fraction form
   2,145.48/2,961.38 = 1,261.32/x
3. Step 3: Cross multiply
   2,145.48x = 2,961.38 × 1,261.32
4. Step 4: Simplify right side
   2,145.48x = 3,735,247.82
5. Step 5: Solve for x
   x = 3,735,247.82/2,145.48
6. Step 6: Final answer
   x = 1,740.98