Finding the Fourth Proportional to 1,780.17, 2,667.85 and 683.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.17 : 2,667.85 = 683.93 : x
2. Step 2: Convert to fraction form
   1,780.17/2,667.85 = 683.93/x
3. Step 3: Cross multiply
   1,780.17x = 2,667.85 × 683.93
4. Step 4: Simplify right side
   1,780.17x = 1,824,622.65
5. Step 5: Solve for x
   x = 1,824,622.65/1,780.17
6. Step 6: Final answer
   x = 1,024.97