Finding the Fourth Proportional to 1,111.36, 1,533.27 and 691.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.36 : 1,533.27 = 691.54 : x
2. Step 2: Convert to fraction form
   1,111.36/1,533.27 = 691.54/x
3. Step 3: Cross multiply
   1,111.36x = 1,533.27 × 691.54
4. Step 4: Simplify right side
   1,111.36x = 1,060,317.54
5. Step 5: Solve for x
   x = 1,060,317.54/1,111.36
6. Step 6: Final answer
   x = 954.07