Finding the Fourth Proportional to 2,140.80, 2,954.17 and 1,196.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.80 : 2,954.17 = 1,196.58 : x
2. Step 2: Convert to fraction form
   2,140.80/2,954.17 = 1,196.58/x
3. Step 3: Cross multiply
   2,140.80x = 2,954.17 × 1,196.58
4. Step 4: Simplify right side
   2,140.80x = 3,534,900.74
5. Step 5: Solve for x
   x = 3,534,900.74/2,140.80
6. Step 6: Final answer
   x = 1,651.21