Finding the Fourth Proportional to 2,557.30, 3,834.98 and 913.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.30 : 3,834.98 = 913.54 : x
2. Step 2: Convert to fraction form
   2,557.30/3,834.98 = 913.54/x
3. Step 3: Cross multiply
   2,557.30x = 3,834.98 × 913.54
4. Step 4: Simplify right side
   2,557.30x = 3,503,407.63
5. Step 5: Solve for x
   x = 3,503,407.63/2,557.30
6. Step 6: Final answer
   x = 1,369.96