Finding the Fourth Proportional to 1,131.50, 1,697.76 and 670.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.50 : 1,697.76 = 670.19 : x
2. Step 2: Convert to fraction form
   1,131.50/1,697.76 = 670.19/x
3. Step 3: Cross multiply
   1,131.50x = 1,697.76 × 670.19
4. Step 4: Simplify right side
   1,131.50x = 1,137,813.29
5. Step 5: Solve for x
   x = 1,137,813.29/1,131.50
6. Step 6: Final answer
   x = 1,005.58