Finding the Fourth Proportional to 1,508.62, 2,081.90 and 879.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.62 : 2,081.90 = 879.52 : x
2. Step 2: Convert to fraction form
   1,508.62/2,081.90 = 879.52/x
3. Step 3: Cross multiply
   1,508.62x = 2,081.90 × 879.52
4. Step 4: Simplify right side
   1,508.62x = 1,831,072.69
5. Step 5: Solve for x
   x = 1,831,072.69/1,508.62
6. Step 6: Final answer
   x = 1,213.74