Finding the Fourth Proportional to 2,605.30, 3,906.76 and 1,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.30 : 3,906.76 = 1,123.82 : x
2. Step 2: Convert to fraction form
   2,605.30/3,906.76 = 1,123.82/x
3. Step 3: Cross multiply
   2,605.30x = 3,906.76 × 1,123.82
4. Step 4: Simplify right side
   2,605.30x = 4,390,486.66
5. Step 5: Solve for x
   x = 4,390,486.66/2,605.30
6. Step 6: Final answer
   x = 1,685.22