Finding the Fourth Proportional to 1,508.59, 2,081.98 and 879.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.59 : 2,081.98 = 879.36 : x
2. Step 2: Convert to fraction form
   1,508.59/2,081.98 = 879.36/x
3. Step 3: Cross multiply
   1,508.59x = 2,081.98 × 879.36
4. Step 4: Simplify right side
   1,508.59x = 1,830,809.93
5. Step 5: Solve for x
   x = 1,830,809.93/1,508.59
6. Step 6: Final answer
   x = 1,213.59