Finding the Fourth Proportional to 2,979.18, 4,111.56 and 2,235.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.18 : 4,111.56 = 2,235.60 : x
2. Step 2: Convert to fraction form
   2,979.18/4,111.56 = 2,235.60/x
3. Step 3: Cross multiply
   2,979.18x = 4,111.56 × 2,235.60
4. Step 4: Simplify right side
   2,979.18x = 9,191,803.54
5. Step 5: Solve for x
   x = 9,191,803.54/2,979.18
6. Step 6: Final answer
   x = 3,085.35