Finding the Fourth Proportional to 1,131.84, 1,697.58 and 438.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.84 : 1,697.58 = 438.83 : x
2. Step 2: Convert to fraction form
   1,131.84/1,697.58 = 438.83/x
3. Step 3: Cross multiply
   1,131.84x = 1,697.58 × 438.83
4. Step 4: Simplify right side
   1,131.84x = 744,940.54
5. Step 5: Solve for x
   x = 744,940.54/1,131.84
6. Step 6: Final answer
   x = 658.17