Finding the Fourth Proportional to 2,513.89, 3,769.25 and 870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.89 : 3,769.25 = 870.56 : x
2. Step 2: Convert to fraction form
   2,513.89/3,769.25 = 870.56/x
3. Step 3: Cross multiply
   2,513.89x = 3,769.25 × 870.56
4. Step 4: Simplify right side
   2,513.89x = 3,281,358.28
5. Step 5: Solve for x
   x = 3,281,358.28/2,513.89
6. Step 6: Final answer
   x = 1,305.29