Finding the Fourth Proportional to 2,158.89, 3,237.81 and 926.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.89 : 3,237.81 = 926.88 : x
2. Step 2: Convert to fraction form
   2,158.89/3,237.81 = 926.88/x
3. Step 3: Cross multiply
   2,158.89x = 3,237.81 × 926.88
4. Step 4: Simplify right side
   2,158.89x = 3,001,061.33
5. Step 5: Solve for x
   x = 3,001,061.33/2,158.89
6. Step 6: Final answer
   x = 1,390.09