Finding the Fourth Proportional to 1,769.92, 2,442.72 and 1,210.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,769.92 : 2,442.72 = 1,210.96 : x
2. Step 2: Convert to fraction form
   1,769.92/2,442.72 = 1,210.96/x
3. Step 3: Cross multiply
   1,769.92x = 2,442.72 × 1,210.96
4. Step 4: Simplify right side
   1,769.92x = 2,958,036.21
5. Step 5: Solve for x
   x = 2,958,036.21/1,769.92
6. Step 6: Final answer
   x = 1,671.28