Finding the Fourth Proportional to 1,105.32, 1,655.82 and 528.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.32 : 1,655.82 = 528.60 : x
2. Step 2: Convert to fraction form
   1,105.32/1,655.82 = 528.60/x
3. Step 3: Cross multiply
   1,105.32x = 1,655.82 × 528.60
4. Step 4: Simplify right side
   1,105.32x = 875,266.45
5. Step 5: Solve for x
   x = 875,266.45/1,105.32
6. Step 6: Final answer
   x = 791.87