Finding the Fourth Proportional to 2,624.79, 3,937.37 and 869.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.79 : 3,937.37 = 869.72 : x
2. Step 2: Convert to fraction form
   2,624.79/3,937.37 = 869.72/x
3. Step 3: Cross multiply
   2,624.79x = 3,937.37 × 869.72
4. Step 4: Simplify right side
   2,624.79x = 3,424,385.40
5. Step 5: Solve for x
   x = 3,424,385.40/2,624.79
6. Step 6: Final answer
   x = 1,304.63