Finding the Fourth Proportional to 1,376.82, 1,899.81 and 911.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.82 : 1,899.81 = 911.70 : x
2. Step 2: Convert to fraction form
   1,376.82/1,899.81 = 911.70/x
3. Step 3: Cross multiply
   1,376.82x = 1,899.81 × 911.70
4. Step 4: Simplify right side
   1,376.82x = 1,732,056.78
5. Step 5: Solve for x
   x = 1,732,056.78/1,376.82
6. Step 6: Final answer
   x = 1,258.01