Finding the Fourth Proportional to 1,587.78, 2,379.23 and 937.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.78 : 2,379.23 = 937.82 : x
2. Step 2: Convert to fraction form
   1,587.78/2,379.23 = 937.82/x
3. Step 3: Cross multiply
   1,587.78x = 2,379.23 × 937.82
4. Step 4: Simplify right side
   1,587.78x = 2,231,289.48
5. Step 5: Solve for x
   x = 2,231,289.48/1,587.78
6. Step 6: Final answer
   x = 1,405.29