Finding the Fourth Proportional to 2,105.12, 2,905.04 and 1,160.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.12 : 2,905.04 = 1,160.98 : x
2. Step 2: Convert to fraction form
   2,105.12/2,905.04 = 1,160.98/x
3. Step 3: Cross multiply
   2,105.12x = 2,905.04 × 1,160.98
4. Step 4: Simplify right side
   2,105.12x = 3,372,693.34
5. Step 5: Solve for x
   x = 3,372,693.34/2,105.12
6. Step 6: Final answer
   x = 1,602.14