Finding the Fourth Proportional to 2,141.72, 2,955.57 and 1,210.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.72 : 2,955.57 = 1,210.22 : x
2. Step 2: Convert to fraction form
   2,141.72/2,955.57 = 1,210.22/x
3. Step 3: Cross multiply
   2,141.72x = 2,955.57 × 1,210.22
4. Step 4: Simplify right side
   2,141.72x = 3,576,888.50
5. Step 5: Solve for x
   x = 3,576,888.50/2,141.72
6. Step 6: Final answer
   x = 1,670.10