Finding the Fourth Proportional to 1,707.84, 2,355.27 and 1,238.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.84 : 2,355.27 = 1,238.82 : x
2. Step 2: Convert to fraction form
   1,707.84/2,355.27 = 1,238.82/x
3. Step 3: Cross multiply
   1,707.84x = 2,355.27 × 1,238.82
4. Step 4: Simplify right side
   1,707.84x = 2,917,755.58
5. Step 5: Solve for x
   x = 2,917,755.58/1,707.84
6. Step 6: Final answer
   x = 1,708.45