Finding the Fourth Proportional to 2,101.98, 2,900.79 and 1,170.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.98 : 2,900.79 = 1,170.54 : x
2. Step 2: Convert to fraction form
   2,101.98/2,900.79 = 1,170.54/x
3. Step 3: Cross multiply
   2,101.98x = 2,900.79 × 1,170.54
4. Step 4: Simplify right side
   2,101.98x = 3,395,490.73
5. Step 5: Solve for x
   x = 3,395,490.73/2,101.98
6. Step 6: Final answer
   x = 1,615.38