Finding the Fourth Proportional to 1,111.82, 1,533.92 and 691.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.82 : 1,533.92 = 691.97 : x
2. Step 2: Convert to fraction form
   1,111.82/1,533.92 = 691.97/x
3. Step 3: Cross multiply
   1,111.82x = 1,533.92 × 691.97
4. Step 4: Simplify right side
   1,111.82x = 1,061,415.49
5. Step 5: Solve for x
   x = 1,061,415.49/1,111.82
6. Step 6: Final answer
   x = 954.67