Finding the Fourth Proportional to 1,212.29, 1,671.89 and 876.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212.29 : 1,671.89 = 876.10 : x
2. Step 2: Convert to fraction form
   1,212.29/1,671.89 = 876.10/x
3. Step 3: Cross multiply
   1,212.29x = 1,671.89 × 876.10
4. Step 4: Simplify right side
   1,212.29x = 1,464,749.38
5. Step 5: Solve for x
   x = 1,464,749.38/1,212.29
6. Step 6: Final answer
   x = 1,208.25