Finding the Fourth Proportional to 1,996.50, 2,755.20 and 1,210.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,996.50 : 2,755.20 = 1,210.56 : x
2. Step 2: Convert to fraction form
   1,996.50/2,755.20 = 1,210.56/x
3. Step 3: Cross multiply
   1,996.50x = 2,755.20 × 1,210.56
4. Step 4: Simplify right side
   1,996.50x = 3,335,334.91
5. Step 5: Solve for x
   x = 3,335,334.91/1,996.50
6. Step 6: Final answer
   x = 1,670.59