Finding the Fourth Proportional to 1,920.77, 2,880.24 and 1,098.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.77 : 2,880.24 = 1,098.82 : x
2. Step 2: Convert to fraction form
   1,920.77/2,880.24 = 1,098.82/x
3. Step 3: Cross multiply
   1,920.77x = 2,880.24 × 1,098.82
4. Step 4: Simplify right side
   1,920.77x = 3,164,865.32
5. Step 5: Solve for x
   x = 3,164,865.32/1,920.77
6. Step 6: Final answer
   x = 1,647.71