Finding the Fourth Proportional to 1,111.27, 1,533.07 and 779.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.27 : 1,533.07 = 779.91 : x
2. Step 2: Convert to fraction form
   1,111.27/1,533.07 = 779.91/x
3. Step 3: Cross multiply
   1,111.27x = 1,533.07 × 779.91
4. Step 4: Simplify right side
   1,111.27x = 1,195,645.06
5. Step 5: Solve for x
   x = 1,195,645.06/1,111.27
6. Step 6: Final answer
   x = 1,075.93