Finding the Fourth Proportional to 2,105.37, 2,905.31 and 1,173.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.37 : 2,905.31 = 1,173.69 : x
2. Step 2: Convert to fraction form
   2,105.37/2,905.31 = 1,173.69/x
3. Step 3: Cross multiply
   2,105.37x = 2,905.31 × 1,173.69
4. Step 4: Simplify right side
   2,105.37x = 3,409,927.43
5. Step 5: Solve for x
   x = 3,409,927.43/2,105.37
6. Step 6: Final answer
   x = 1,619.63