Finding the Fourth Proportional to 2,142.80, 3,196.12 and 1,954.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.80 : 3,196.12 = 1,954.16 : x
2. Step 2: Convert to fraction form
   2,142.80/3,196.12 = 1,954.16/x
3. Step 3: Cross multiply
   2,142.80x = 3,196.12 × 1,954.16
4. Step 4: Simplify right side
   2,142.80x = 6,245,729.86
5. Step 5: Solve for x
   x = 6,245,729.86/2,142.80
6. Step 6: Final answer
   x = 2,914.75