Finding the Fourth Proportional to 1,357.38, 1,870.56 and 963.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.38 : 1,870.56 = 963.72 : x
2. Step 2: Convert to fraction form
   1,357.38/1,870.56 = 963.72/x
3. Step 3: Cross multiply
   1,357.38x = 1,870.56 × 963.72
4. Step 4: Simplify right side
   1,357.38x = 1,802,696.08
5. Step 5: Solve for x
   x = 1,802,696.08/1,357.38
6. Step 6: Final answer
   x = 1,328.07