Finding the Fourth Proportional to 1,680.72, 2,319.48 and 1,017.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.72 : 2,319.48 = 1,017.48 : x
2. Step 2: Convert to fraction form
   1,680.72/2,319.48 = 1,017.48/x
3. Step 3: Cross multiply
   1,680.72x = 2,319.48 × 1,017.48
4. Step 4: Simplify right side
   1,680.72x = 2,360,024.51
5. Step 5: Solve for x
   x = 2,360,024.51/1,680.72
6. Step 6: Final answer
   x = 1,404.17