Finding the Fourth Proportional to 1,541.34, 2,126.88 and 911.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,541.34 : 2,126.88 = 911.89 : x
2. Step 2: Convert to fraction form
   1,541.34/2,126.88 = 911.89/x
3. Step 3: Cross multiply
   1,541.34x = 2,126.88 × 911.89
4. Step 4: Simplify right side
   1,541.34x = 1,939,475.29
5. Step 5: Solve for x
   x = 1,939,475.29/1,541.34
6. Step 6: Final answer
   x = 1,258.31