Finding the Fourth Proportional to 2,145.49, 2,961.24 and 1,306.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.49 : 2,961.24 = 1,306.47 : x
2. Step 2: Convert to fraction form
   2,145.49/2,961.24 = 1,306.47/x
3. Step 3: Cross multiply
   2,145.49x = 2,961.24 × 1,306.47
4. Step 4: Simplify right side
   2,145.49x = 3,868,767.55
5. Step 5: Solve for x
   x = 3,868,767.55/2,145.49
6. Step 6: Final answer
   x = 1,803.21