Finding the Fourth Proportional to 2,385.16, 3,577.43 and 923.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.16 : 3,577.43 = 923.31 : x
2. Step 2: Convert to fraction form
   2,385.16/3,577.43 = 923.31/x
3. Step 3: Cross multiply
   2,385.16x = 3,577.43 × 923.31
4. Step 4: Simplify right side
   2,385.16x = 3,303,079.20
5. Step 5: Solve for x
   x = 3,303,079.20/2,385.16
6. Step 6: Final answer
   x = 1,384.85