Finding the Fourth Proportional to 2,116.40, 3,171.58 and 1,190.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.40 : 3,171.58 = 1,190.02 : x
2. Step 2: Convert to fraction form
   2,116.40/3,171.58 = 1,190.02/x
3. Step 3: Cross multiply
   2,116.40x = 3,171.58 × 1,190.02
4. Step 4: Simplify right side
   2,116.40x = 3,774,233.10
5. Step 5: Solve for x
   x = 3,774,233.10/2,116.40
6. Step 6: Final answer
   x = 1,783.32