Finding the Fourth Proportional to 2,579.53, 3,869.76 and 938.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.53 : 3,869.76 = 938.37 : x
2. Step 2: Convert to fraction form
   2,579.53/3,869.76 = 938.37/x
3. Step 3: Cross multiply
   2,579.53x = 3,869.76 × 938.37
4. Step 4: Simplify right side
   2,579.53x = 3,631,266.69
5. Step 5: Solve for x
   x = 3,631,266.69/2,579.53
6. Step 6: Final answer
   x = 1,407.72