Finding the Fourth Proportional to 2,145.06, 2,959.94 and 1,200.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.06 : 2,959.94 = 1,200.87 : x
2. Step 2: Convert to fraction form
   2,145.06/2,959.94 = 1,200.87/x
3. Step 3: Cross multiply
   2,145.06x = 2,959.94 × 1,200.87
4. Step 4: Simplify right side
   2,145.06x = 3,554,506.15
5. Step 5: Solve for x
   x = 3,554,506.15/2,145.06
6. Step 6: Final answer
   x = 1,657.07