Finding the Fourth Proportional to 1,385.79, 2,077.17 and 683.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.79 : 2,077.17 = 683.48 : x
2. Step 2: Convert to fraction form
   1,385.79/2,077.17 = 683.48/x
3. Step 3: Cross multiply
   1,385.79x = 2,077.17 × 683.48
4. Step 4: Simplify right side
   1,385.79x = 1,419,704.15
5. Step 5: Solve for x
   x = 1,419,704.15/1,385.79
6. Step 6: Final answer
   x = 1,024.47