Finding the Fourth Proportional to 1,786.61, 2,678.91 and 745.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.61 : 2,678.91 = 745.49 : x
2. Step 2: Convert to fraction form
   1,786.61/2,678.91 = 745.49/x
3. Step 3: Cross multiply
   1,786.61x = 2,678.91 × 745.49
4. Step 4: Simplify right side
   1,786.61x = 1,997,100.62
5. Step 5: Solve for x
   x = 1,997,100.62/1,786.61
6. Step 6: Final answer
   x = 1,117.82