Finding the Fourth Proportional to 1,131.79, 1,697.01 and 670.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.79 : 1,697.01 = 670.09 : x
2. Step 2: Convert to fraction form
   1,131.79/1,697.01 = 670.09/x
3. Step 3: Cross multiply
   1,131.79x = 1,697.01 × 670.09
4. Step 4: Simplify right side
   1,131.79x = 1,137,149.43
5. Step 5: Solve for x
   x = 1,137,149.43/1,131.79
6. Step 6: Final answer
   x = 1,004.74