Finding the Fourth Proportional to 1,377.16, 1,900.98 and 911.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.16 : 1,900.98 = 911.56 : x
2. Step 2: Convert to fraction form
   1,377.16/1,900.98 = 911.56/x
3. Step 3: Cross multiply
   1,377.16x = 1,900.98 × 911.56
4. Step 4: Simplify right side
   1,377.16x = 1,732,857.33
5. Step 5: Solve for x
   x = 1,732,857.33/1,377.16
6. Step 6: Final answer
   x = 1,258.28