Finding the Fourth Proportional to 1,385.34, 1,908.32 and 964.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.34 : 1,908.32 = 964.95 : x
2. Step 2: Convert to fraction form
   1,385.34/1,908.32 = 964.95/x
3. Step 3: Cross multiply
   1,385.34x = 1,908.32 × 964.95
4. Step 4: Simplify right side
   1,385.34x = 1,841,433.38
5. Step 5: Solve for x
   x = 1,841,433.38/1,385.34
6. Step 6: Final answer
   x = 1,329.23