Finding the Fourth Proportional to 1,111.38, 1,533.75 and 691.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.38 : 1,533.75 = 691.98 : x
2. Step 2: Convert to fraction form
   1,111.38/1,533.75 = 691.98/x
3. Step 3: Cross multiply
   1,111.38x = 1,533.75 × 691.98
4. Step 4: Simplify right side
   1,111.38x = 1,061,324.33
5. Step 5: Solve for x
   x = 1,061,324.33/1,111.38
6. Step 6: Final answer
   x = 954.96