Finding the Fourth Proportional to 1,182.30, 1,631.71 and 678.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.30 : 1,631.71 = 678.33 : x
2. Step 2: Convert to fraction form
   1,182.30/1,631.71 = 678.33/x
3. Step 3: Cross multiply
   1,182.30x = 1,631.71 × 678.33
4. Step 4: Simplify right side
   1,182.30x = 1,106,837.84
5. Step 5: Solve for x
   x = 1,106,837.84/1,182.30
6. Step 6: Final answer
   x = 936.18