Finding the Fourth Proportional to 2,141.89, 2,955.78 and 1,210.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.89 : 2,955.78 = 1,210.39 : x
2. Step 2: Convert to fraction form
   2,141.89/2,955.78 = 1,210.39/x
3. Step 3: Cross multiply
   2,141.89x = 2,955.78 × 1,210.39
4. Step 4: Simplify right side
   2,141.89x = 3,577,646.55
5. Step 5: Solve for x
   x = 3,577,646.55/2,141.89
6. Step 6: Final answer
   x = 1,670.32