Finding the Fourth Proportional to 2,385.61, 3,576.81 and 923.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.61 : 3,576.81 = 923.05 : x
2. Step 2: Convert to fraction form
   2,385.61/3,576.81 = 923.05/x
3. Step 3: Cross multiply
   2,385.61x = 3,576.81 × 923.05
4. Step 4: Simplify right side
   2,385.61x = 3,301,574.47
5. Step 5: Solve for x
   x = 3,301,574.47/2,385.61
6. Step 6: Final answer
   x = 1,383.95