Finding the Fourth Proportional to 1,587.86, 2,379.72 and 885.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.86 : 2,379.72 = 885.04 : x
2. Step 2: Convert to fraction form
   1,587.86/2,379.72 = 885.04/x
3. Step 3: Cross multiply
   1,587.86x = 2,379.72 × 885.04
4. Step 4: Simplify right side
   1,587.86x = 2,106,147.39
5. Step 5: Solve for x
   x = 2,106,147.39/1,587.86
6. Step 6: Final answer
   x = 1,326.41