Finding the Fourth Proportional to 1,736.78, 2,394.26 and 1,238.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.78 : 2,394.26 = 1,238.55 : x
2. Step 2: Convert to fraction form
   1,736.78/2,394.26 = 1,238.55/x
3. Step 3: Cross multiply
   1,736.78x = 2,394.26 × 1,238.55
4. Step 4: Simplify right side
   1,736.78x = 2,965,404.53
5. Step 5: Solve for x
   x = 2,965,404.53/1,736.78
6. Step 6: Final answer
   x = 1,707.42