Finding the Fourth Proportional to 2,087.72, 2,880.42 and 1,203

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.72 : 2,880.42 = 1,203 : x
2. Step 2: Convert to fraction form
   2,087.72/2,880.42 = 1,203/x
3. Step 3: Cross multiply
   2,087.72x = 2,880.42 × 1,203
4. Step 4: Simplify right side
   2,087.72x = 3,465,145.26
5. Step 5: Solve for x
   x = 3,465,145.26/2,087.72
6. Step 6: Final answer
   x = 1,659.77