Finding the Fourth Proportional to 2,141.25, 3,211.81 and 970.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.25 : 3,211.81 = 970.40 : x
2. Step 2: Convert to fraction form
   2,141.25/3,211.81 = 970.40/x
3. Step 3: Cross multiply
   2,141.25x = 3,211.81 × 970.40
4. Step 4: Simplify right side
   2,141.25x = 3,116,719.51
5. Step 5: Solve for x
   x = 3,116,719.51/2,141.25
6. Step 6: Final answer
   x = 1,455.56