Finding the Fourth Proportional to 1,131.98, 1,698.03 and 401.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.98 : 1,698.03 = 401.30 : x
2. Step 2: Convert to fraction form
   1,131.98/1,698.03 = 401.30/x
3. Step 3: Cross multiply
   1,131.98x = 1,698.03 × 401.30
4. Step 4: Simplify right side
   1,131.98x = 681,419.44
5. Step 5: Solve for x
   x = 681,419.44/1,131.98
6. Step 6: Final answer
   x = 601.97