Finding the Fourth Proportional to 1,131.35, 1,698.99 and 672.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.35 : 1,698.99 = 672.02 : x
2. Step 2: Convert to fraction form
   1,131.35/1,698.99 = 672.02/x
3. Step 3: Cross multiply
   1,131.35x = 1,698.99 × 672.02
4. Step 4: Simplify right side
   1,131.35x = 1,141,756.34
5. Step 5: Solve for x
   x = 1,141,756.34/1,131.35
6. Step 6: Final answer
   x = 1,009.19