Finding the Fourth Proportional to 2,513.30, 3,770.42 and 869.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.30 : 3,770.42 = 869.94 : x
2. Step 2: Convert to fraction form
   2,513.30/3,770.42 = 869.94/x
3. Step 3: Cross multiply
   2,513.30x = 3,770.42 × 869.94
4. Step 4: Simplify right side
   2,513.30x = 3,280,034.83
5. Step 5: Solve for x
   x = 3,280,034.83/2,513.30
6. Step 6: Final answer
   x = 1,305.07