Finding the Fourth Proportional to 2,513.18, 3,768.40 and 869.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,513.18 : 3,768.40 = 869.59 : x
2. Step 2: Convert to fraction form
   2,513.18/3,768.40 = 869.59/x
3. Step 3: Cross multiply
   2,513.18x = 3,768.40 × 869.59
4. Step 4: Simplify right side
   2,513.18x = 3,276,962.96
5. Step 5: Solve for x
   x = 3,276,962.96/2,513.18
6. Step 6: Final answer
   x = 1,303.91