Finding the Fourth Proportional to 1,091.79, 1,506.47 and 738.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.79 : 1,506.47 = 738.09 : x
2. Step 2: Convert to fraction form
   1,091.79/1,506.47 = 738.09/x
3. Step 3: Cross multiply
   1,091.79x = 1,506.47 × 738.09
4. Step 4: Simplify right side
   1,091.79x = 1,111,906.75
5. Step 5: Solve for x
   x = 1,111,906.75/1,091.79
6. Step 6: Final answer
   x = 1,018.43