Finding the Fourth Proportional to 1,636.89, 2,258.31 and 937.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.89 : 2,258.31 = 937.86 : x
2. Step 2: Convert to fraction form
   1,636.89/2,258.31 = 937.86/x
3. Step 3: Cross multiply
   1,636.89x = 2,258.31 × 937.86
4. Step 4: Simplify right side
   1,636.89x = 2,117,978.62
5. Step 5: Solve for x
   x = 2,117,978.62/1,636.89
6. Step 6: Final answer
   x = 1,293.90