Finding the Fourth Proportional to 1,680.59, 2,319.17 and 934.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.59 : 2,319.17 = 934.53 : x
2. Step 2: Convert to fraction form
   1,680.59/2,319.17 = 934.53/x
3. Step 3: Cross multiply
   1,680.59x = 2,319.17 × 934.53
4. Step 4: Simplify right side
   1,680.59x = 2,167,329.27
5. Step 5: Solve for x
   x = 2,167,329.27/1,680.59
6. Step 6: Final answer
   x = 1,289.63