Finding the Fourth Proportional to 2,871.39, 4,307.73 and 923.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.39 : 4,307.73 = 923.58 : x
2. Step 2: Convert to fraction form
   2,871.39/4,307.73 = 923.58/x
3. Step 3: Cross multiply
   2,871.39x = 4,307.73 × 923.58
4. Step 4: Simplify right side
   2,871.39x = 3,978,533.27
5. Step 5: Solve for x
   x = 3,978,533.27/2,871.39
6. Step 6: Final answer
   x = 1,385.58