Finding the Fourth Proportional to 1,680.72, 2,318.96 and 1,017.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.72 : 2,318.96 = 1,017.88 : x
2. Step 2: Convert to fraction form
   1,680.72/2,318.96 = 1,017.88/x
3. Step 3: Cross multiply
   1,680.72x = 2,318.96 × 1,017.88
4. Step 4: Simplify right side
   1,680.72x = 2,360,423.00
5. Step 5: Solve for x
   x = 2,360,423.00/1,680.72
6. Step 6: Final answer
   x = 1,404.41