Finding the Fourth Proportional to 2,141.64, 2,955.82 and 1,245.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.64 : 2,955.82 = 1,245.90 : x
2. Step 2: Convert to fraction form
   2,141.64/2,955.82 = 1,245.90/x
3. Step 3: Cross multiply
   2,141.64x = 2,955.82 × 1,245.90
4. Step 4: Simplify right side
   2,141.64x = 3,682,649.73
5. Step 5: Solve for x
   x = 3,682,649.73/2,141.64
6. Step 6: Final answer
   x = 1,719.55