Finding the Fourth Proportional to 1,131.99, 1,698.24 and 401.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.99 : 1,698.24 = 401.56 : x
2. Step 2: Convert to fraction form
   1,131.99/1,698.24 = 401.56/x
3. Step 3: Cross multiply
   1,131.99x = 1,698.24 × 401.56
4. Step 4: Simplify right side
   1,131.99x = 681,945.25
5. Step 5: Solve for x
   x = 681,945.25/1,131.99
6. Step 6: Final answer
   x = 602.43