Finding the Fourth Proportional to 1,978.69, 2,966.28 and 745.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.69 : 2,966.28 = 745.75 : x
2. Step 2: Convert to fraction form
   1,978.69/2,966.28 = 745.75/x
3. Step 3: Cross multiply
   1,978.69x = 2,966.28 × 745.75
4. Step 4: Simplify right side
   1,978.69x = 2,212,103.31
5. Step 5: Solve for x
   x = 2,212,103.31/1,978.69
6. Step 6: Final answer
   x = 1,117.96