Finding the Fourth Proportional to 805.80, 1,111.86 and 695.10

Step by Step Solution

1. Step 1: Write the proportion equation
   805.80 : 1,111.86 = 695.10 : x
2. Step 2: Convert to fraction form
   805.80/1,111.86 = 695.10/x
3. Step 3: Cross multiply
   805.80x = 1,111.86 × 695.10
4. Step 4: Simplify right side
   805.80x = 772,853.89
5. Step 5: Solve for x
   x = 772,853.89/805.80
6. Step 6: Final answer
   x = 959.11