Finding the Fourth Proportional to 1,680.89, 2,320.04 and 1,017.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.89 : 2,320.04 = 1,017.63 : x
2. Step 2: Convert to fraction form
   1,680.89/2,320.04 = 1,017.63/x
3. Step 3: Cross multiply
   1,680.89x = 2,320.04 × 1,017.63
4. Step 4: Simplify right side
   1,680.89x = 2,360,942.31
5. Step 5: Solve for x
   x = 2,360,942.31/1,680.89
6. Step 6: Final answer
   x = 1,404.58