Finding the Fourth Proportional to 1,109.12, 1,530.56 and 760

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.12 : 1,530.56 = 760 : x
2. Step 2: Convert to fraction form
   1,109.12/1,530.56 = 760/x
3. Step 3: Cross multiply
   1,109.12x = 1,530.56 × 760
4. Step 4: Simplify right side
   1,109.12x = 1,163,225.60
5. Step 5: Solve for x
   x = 1,163,225.60/1,109.12
6. Step 6: Final answer
   x = 1,048.78