Finding the Fourth Proportional to 1,111.63, 1,529.52 and 911.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.63 : 1,529.52 = 911.73 : x
2. Step 2: Convert to fraction form
   1,111.63/1,529.52 = 911.73/x
3. Step 3: Cross multiply
   1,111.63x = 1,529.52 × 911.73
4. Step 4: Simplify right side
   1,111.63x = 1,394,509.27
5. Step 5: Solve for x
   x = 1,394,509.27/1,111.63
6. Step 6: Final answer
   x = 1,254.47