Finding the Fourth Proportional to 1,456.34, 2,186.72 and 911.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.34 : 2,186.72 = 911.96 : x
2. Step 2: Convert to fraction form
   1,456.34/2,186.72 = 911.96/x
3. Step 3: Cross multiply
   1,456.34x = 2,186.72 × 911.96
4. Step 4: Simplify right side
   1,456.34x = 1,994,201.17
5. Step 5: Solve for x
   x = 1,994,201.17/1,456.34
6. Step 6: Final answer
   x = 1,369.32