Finding the Fourth Proportional to 2,871.59, 4,307.06 and 923.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,871.59 : 4,307.06 = 923.63 : x
2. Step 2: Convert to fraction form
   2,871.59/4,307.06 = 923.63/x
3. Step 3: Cross multiply
   2,871.59x = 4,307.06 × 923.63
4. Step 4: Simplify right side
   2,871.59x = 3,978,110.60
5. Step 5: Solve for x
   x = 3,978,110.60/2,871.59
6. Step 6: Final answer
   x = 1,385.34