Finding the Fourth Proportional to 1,869.50, 2,580.16 and 1,208.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,869.50 : 2,580.16 = 1,208.28 : x
2. Step 2: Convert to fraction form
   1,869.50/2,580.16 = 1,208.28/x
3. Step 3: Cross multiply
   1,869.50x = 2,580.16 × 1,208.28
4. Step 4: Simplify right side
   1,869.50x = 3,117,555.72
5. Step 5: Solve for x
   x = 3,117,555.72/1,869.50
6. Step 6: Final answer
   x = 1,667.59