Finding the Fourth Proportional to 1,111.41, 1,532.95 and 779.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.41 : 1,532.95 = 779.91 : x
2. Step 2: Convert to fraction form
   1,111.41/1,532.95 = 779.91/x
3. Step 3: Cross multiply
   1,111.41x = 1,532.95 × 779.91
4. Step 4: Simplify right side
   1,111.41x = 1,195,563.03
5. Step 5: Solve for x
   x = 1,195,563.03/1,111.41
6. Step 6: Final answer
   x = 1,075.72