Finding the Fourth Proportional to 2,145.29, 2,959.81 and 1,200.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.29 : 2,959.81 = 1,200.95 : x
2. Step 2: Convert to fraction form
   2,145.29/2,959.81 = 1,200.95/x
3. Step 3: Cross multiply
   2,145.29x = 2,959.81 × 1,200.95
4. Step 4: Simplify right side
   2,145.29x = 3,554,583.82
5. Step 5: Solve for x
   x = 3,554,583.82/2,145.29
6. Step 6: Final answer
   x = 1,656.92