Finding the Fourth Proportional to 1,084.39, 1,628.71 and 623.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.39 : 1,628.71 = 623.09 : x
2. Step 2: Convert to fraction form
   1,084.39/1,628.71 = 623.09/x
3. Step 3: Cross multiply
   1,084.39x = 1,628.71 × 623.09
4. Step 4: Simplify right side
   1,084.39x = 1,014,835.43
5. Step 5: Solve for x
   x = 1,014,835.43/1,084.39
6. Step 6: Final answer
   x = 935.86