Finding the Fourth Proportional to 1,131.34, 1,697.37 and 438.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.34 : 1,697.37 = 438.34 : x
2. Step 2: Convert to fraction form
   1,131.34/1,697.37 = 438.34/x
3. Step 3: Cross multiply
   1,131.34x = 1,697.37 × 438.34
4. Step 4: Simplify right side
   1,131.34x = 744,025.17
5. Step 5: Solve for x
   x = 744,025.17/1,131.34
6. Step 6: Final answer
   x = 657.65