Finding the Fourth Proportional to 2,624.90, 3,936.35 and 869.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.90 : 3,936.35 = 869.37 : x
2. Step 2: Convert to fraction form
   2,624.90/3,936.35 = 869.37/x
3. Step 3: Cross multiply
   2,624.90x = 3,936.35 × 869.37
4. Step 4: Simplify right side
   2,624.90x = 3,422,140.25
5. Step 5: Solve for x
   x = 3,422,140.25/2,624.90
6. Step 6: Final answer
   x = 1,303.72