Finding the Fourth Proportional to 2,116.17, 2,917.56 and 1,618.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.17 : 2,917.56 = 1,618.02 : x
2. Step 2: Convert to fraction form
   2,116.17/2,917.56 = 1,618.02/x
3. Step 3: Cross multiply
   2,116.17x = 2,917.56 × 1,618.02
4. Step 4: Simplify right side
   2,116.17x = 4,720,677.73
5. Step 5: Solve for x
   x = 4,720,677.73/2,116.17
6. Step 6: Final answer
   x = 2,230.76