Finding the Fourth Proportional to 2,142.24, 2,956.32 and 1,210.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.24 : 2,956.32 = 1,210.76 : x
2. Step 2: Convert to fraction form
   2,142.24/2,956.32 = 1,210.76/x
3. Step 3: Cross multiply
   2,142.24x = 2,956.32 × 1,210.76
4. Step 4: Simplify right side
   2,142.24x = 3,579,394.00
5. Step 5: Solve for x
   x = 3,579,394.00/2,142.24
6. Step 6: Final answer
   x = 1,670.87