Finding the Fourth Proportional to 2,102.91, 2,902.10 and 1,171.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.91 : 2,902.10 = 1,171.59 : x
2. Step 2: Convert to fraction form
   2,102.91/2,902.10 = 1,171.59/x
3. Step 3: Cross multiply
   2,102.91x = 2,902.10 × 1,171.59
4. Step 4: Simplify right side
   2,102.91x = 3,400,065.48
5. Step 5: Solve for x
   x = 3,400,065.48/2,102.91
6. Step 6: Final answer
   x = 1,616.84