Finding the Fourth Proportional to 2,513.05, 3,770.49 and 869.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.05 : 3,770.49 = 869.76 : x
2. Step 2: Convert to fraction form
   2,513.05/3,770.49 = 869.76/x
3. Step 3: Cross multiply
   2,513.05x = 3,770.49 × 869.76
4. Step 4: Simplify right side
   2,513.05x = 3,279,421.38
5. Step 5: Solve for x
   x = 3,279,421.38/2,513.05
6. Step 6: Final answer
   x = 1,304.96