Finding the Fourth Proportional to 2,141.71, 2,955.22 and 1,245.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.71 : 2,955.22 = 1,245.64 : x
2. Step 2: Convert to fraction form
   2,141.71/2,955.22 = 1,245.64/x
3. Step 3: Cross multiply
   2,141.71x = 2,955.22 × 1,245.64
4. Step 4: Simplify right side
   2,141.71x = 3,681,144.51
5. Step 5: Solve for x
   x = 3,681,144.51/2,141.71
6. Step 6: Final answer
   x = 1,718.79