Finding the Fourth Proportional to 1,091.58, 1,503.72 and 933.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.58 : 1,503.72 = 933.72 : x
2. Step 2: Convert to fraction form
   1,091.58/1,503.72 = 933.72/x
3. Step 3: Cross multiply
   1,091.58x = 1,503.72 × 933.72
4. Step 4: Simplify right side
   1,091.58x = 1,404,053.44
5. Step 5: Solve for x
   x = 1,404,053.44/1,091.58
6. Step 6: Final answer
   x = 1,286.26