Finding the Fourth Proportional to 2,141.55, 2,955.30 and 1,210.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.55 : 2,955.30 = 1,210.05 : x
2. Step 2: Convert to fraction form
   2,141.55/2,955.30 = 1,210.05/x
3. Step 3: Cross multiply
   2,141.55x = 2,955.30 × 1,210.05
4. Step 4: Simplify right side
   2,141.55x = 3,576,060.77
5. Step 5: Solve for x
   x = 3,576,060.77/2,141.55
6. Step 6: Final answer
   x = 1,669.85