Finding the Fourth Proportional to 1,680.70, 2,317.86 and 1,149.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.70 : 2,317.86 = 1,149.34 : x
2. Step 2: Convert to fraction form
   1,680.70/2,317.86 = 1,149.34/x
3. Step 3: Cross multiply
   1,680.70x = 2,317.86 × 1,149.34
4. Step 4: Simplify right side
   1,680.70x = 2,664,009.21
5. Step 5: Solve for x
   x = 2,664,009.21/1,680.70
6. Step 6: Final answer
   x = 1,585.06