Finding the Fourth Proportional to 1,131.87, 1,697.76 and 401.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.87 : 1,697.76 = 401.42 : x
2. Step 2: Convert to fraction form
   1,131.87/1,697.76 = 401.42/x
3. Step 3: Cross multiply
   1,131.87x = 1,697.76 × 401.42
4. Step 4: Simplify right side
   1,131.87x = 681,519.06
5. Step 5: Solve for x
   x = 681,519.06/1,131.87
6. Step 6: Final answer
   x = 602.12