Finding the Fourth Proportional to 1,131.86, 1,697.73 and 401.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.86 : 1,697.73 = 401.42 : x
2. Step 2: Convert to fraction form
   1,131.86/1,697.73 = 401.42/x
3. Step 3: Cross multiply
   1,131.86x = 1,697.73 × 401.42
4. Step 4: Simplify right side
   1,131.86x = 681,508.90
5. Step 5: Solve for x
   x = 681,508.90/1,131.86
6. Step 6: Final answer
   x = 602.12