Finding the Fourth Proportional to 1,969.83, 2,951.73 and 1,091.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.83 : 2,951.73 = 1,091.61 : x
2. Step 2: Convert to fraction form
   1,969.83/2,951.73 = 1,091.61/x
3. Step 3: Cross multiply
   1,969.83x = 2,951.73 × 1,091.61
4. Step 4: Simplify right side
   1,969.83x = 3,222,137.99
5. Step 5: Solve for x
   x = 3,222,137.99/1,969.83
6. Step 6: Final answer
   x = 1,635.74