Finding the Fourth Proportional to 2,670.52, 4,007.21 and 1,111.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.52 : 4,007.21 = 1,111.60 : x
2. Step 2: Convert to fraction form
   2,670.52/4,007.21 = 1,111.60/x
3. Step 3: Cross multiply
   2,670.52x = 4,007.21 × 1,111.60
4. Step 4: Simplify right side
   2,670.52x = 4,454,412.20
5. Step 5: Solve for x
   x = 4,454,412.20/2,670.52
6. Step 6: Final answer
   x = 1,667.99