Finding the Fourth Proportional to 2,513.38, 3,770.74 and 870.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.38 : 3,770.74 = 870.06 : x
2. Step 2: Convert to fraction form
   2,513.38/3,770.74 = 870.06/x
3. Step 3: Cross multiply
   2,513.38x = 3,770.74 × 870.06
4. Step 4: Simplify right side
   2,513.38x = 3,280,770.04
5. Step 5: Solve for x
   x = 3,280,770.04/2,513.38
6. Step 6: Final answer
   x = 1,305.32