Finding the Fourth Proportional to 2,512.89, 3,769.69 and 869.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,512.89 : 3,769.69 = 869.05 : x
2. Step 2: Convert to fraction form
   2,512.89/3,769.69 = 869.05/x
3. Step 3: Cross multiply
   2,512.89x = 3,769.69 × 869.05
4. Step 4: Simplify right side
   2,512.89x = 3,276,032.06
5. Step 5: Solve for x
   x = 3,276,032.06/2,512.89
6. Step 6: Final answer
   x = 1,303.69