Finding the Fourth Proportional to 1,619.34, 2,234.89 and 911.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.34 : 2,234.89 = 911.45 : x
2. Step 2: Convert to fraction form
   1,619.34/2,234.89 = 911.45/x
3. Step 3: Cross multiply
   1,619.34x = 2,234.89 × 911.45
4. Step 4: Simplify right side
   1,619.34x = 2,036,997.22
5. Step 5: Solve for x
   x = 2,036,997.22/1,619.34
6. Step 6: Final answer
   x = 1,257.92