Finding the Fourth Proportional to 2,670.80, 4,007.42 and 1,111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.80 : 4,007.42 = 1,111.96 : x
2. Step 2: Convert to fraction form
   2,670.80/4,007.42 = 1,111.96/x
3. Step 3: Cross multiply
   2,670.80x = 4,007.42 × 1,111.96
4. Step 4: Simplify right side
   2,670.80x = 4,456,065.15
5. Step 5: Solve for x
   x = 4,456,065.15/2,670.80
6. Step 6: Final answer
   x = 1,668.44