Finding the Fourth Proportional to 2,105.60, 2,905.88 and 1,174.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.60 : 2,905.88 = 1,174.08 : x
2. Step 2: Convert to fraction form
   2,105.60/2,905.88 = 1,174.08/x
3. Step 3: Cross multiply
   2,105.60x = 2,905.88 × 1,174.08
4. Step 4: Simplify right side
   2,105.60x = 3,411,735.59
5. Step 5: Solve for x
   x = 3,411,735.59/2,105.60
6. Step 6: Final answer
   x = 1,620.32