Finding the Fourth Proportional to 2,079.58, 3,116.13 and 1,618.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.58 : 3,116.13 = 1,618.60 : x
2. Step 2: Convert to fraction form
   2,079.58/3,116.13 = 1,618.60/x
3. Step 3: Cross multiply
   2,079.58x = 3,116.13 × 1,618.60
4. Step 4: Simplify right side
   2,079.58x = 5,043,768.02
5. Step 5: Solve for x
   x = 5,043,768.02/2,079.58
6. Step 6: Final answer
   x = 2,425.38