Finding the Fourth Proportional to 1,111.29, 1,533.27 and 691.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.29 : 1,533.27 = 691.83 : x
2. Step 2: Convert to fraction form
   1,111.29/1,533.27 = 691.83/x
3. Step 3: Cross multiply
   1,111.29x = 1,533.27 × 691.83
4. Step 4: Simplify right side
   1,111.29x = 1,060,762.18
5. Step 5: Solve for x
   x = 1,060,762.18/1,111.29
6. Step 6: Final answer
   x = 954.53