Finding the Fourth Proportional to 1,131.96, 1,698.12 and 401.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.96 : 1,698.12 = 401.43 : x
2. Step 2: Convert to fraction form
   1,131.96/1,698.12 = 401.43/x
3. Step 3: Cross multiply
   1,131.96x = 1,698.12 × 401.43
4. Step 4: Simplify right side
   1,131.96x = 681,676.31
5. Step 5: Solve for x
   x = 681,676.31/1,131.96
6. Step 6: Final answer
   x = 602.21