Finding the Fourth Proportional to 1,111.93, 1,533.27 and 780.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.93 : 1,533.27 = 780.25 : x
2. Step 2: Convert to fraction form
   1,111.93/1,533.27 = 780.25/x
3. Step 3: Cross multiply
   1,111.93x = 1,533.27 × 780.25
4. Step 4: Simplify right side
   1,111.93x = 1,196,333.92
5. Step 5: Solve for x
   x = 1,196,333.92/1,111.93
6. Step 6: Final answer
   x = 1,075.91