Finding the Fourth Proportional to 805.58, 1,111.31 and 525.69

Step by Step Solution

1. Step 1: Write the proportion equation
   805.58 : 1,111.31 = 525.69 : x
2. Step 2: Convert to fraction form
   805.58/1,111.31 = 525.69/x
3. Step 3: Cross multiply
   805.58x = 1,111.31 × 525.69
4. Step 4: Simplify right side
   805.58x = 584,196.37
5. Step 5: Solve for x
   x = 584,196.37/805.58
6. Step 6: Final answer
   x = 725.19