Finding the Fourth Proportional to 1,105.82, 1,525.59 and 663.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.82 : 1,525.59 = 663.77 : x
2. Step 2: Convert to fraction form
   1,105.82/1,525.59 = 663.77/x
3. Step 3: Cross multiply
   1,105.82x = 1,525.59 × 663.77
4. Step 4: Simplify right side
   1,105.82x = 1,012,633.25
5. Step 5: Solve for x
   x = 1,012,633.25/1,105.82
6. Step 6: Final answer
   x = 915.73