Finding the Fourth Proportional to 1,705.98, 2,355.39 and 1,007.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.98 : 2,355.39 = 1,007.58 : x
2. Step 2: Convert to fraction form
   1,705.98/2,355.39 = 1,007.58/x
3. Step 3: Cross multiply
   1,705.98x = 2,355.39 × 1,007.58
4. Step 4: Simplify right side
   1,705.98x = 2,373,243.86
5. Step 5: Solve for x
   x = 2,373,243.86/1,705.98
6. Step 6: Final answer
   x = 1,391.13