Finding the Fourth Proportional to 1,111.59, 1,668.51 and 673.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.59 : 1,668.51 = 673.92 : x
2. Step 2: Convert to fraction form
   1,111.59/1,668.51 = 673.92/x
3. Step 3: Cross multiply
   1,111.59x = 1,668.51 × 673.92
4. Step 4: Simplify right side
   1,111.59x = 1,124,442.26
5. Step 5: Solve for x
   x = 1,124,442.26/1,111.59
6. Step 6: Final answer
   x = 1,011.56