Finding the Fourth Proportional to 1,354.39, 1,870.61 and 911.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.39 : 1,870.61 = 911.53 : x
2. Step 2: Convert to fraction form
   1,354.39/1,870.61 = 911.53/x
3. Step 3: Cross multiply
   1,354.39x = 1,870.61 × 911.53
4. Step 4: Simplify right side
   1,354.39x = 1,705,104.39
5. Step 5: Solve for x
   x = 1,705,104.39/1,354.39
6. Step 6: Final answer
   x = 1,258.94