Finding the Fourth Proportional to 2,076.56, 3,109.44 and 1,210.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.56 : 3,109.44 = 1,210.40 : x
2. Step 2: Convert to fraction form
   2,076.56/3,109.44 = 1,210.40/x
3. Step 3: Cross multiply
   2,076.56x = 3,109.44 × 1,210.40
4. Step 4: Simplify right side
   2,076.56x = 3,763,666.18
5. Step 5: Solve for x
   x = 3,763,666.18/2,076.56
6. Step 6: Final answer
   x = 1,812.45