Finding the Fourth Proportional to 1,105.58, 1,525.37 and 663.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.58 : 1,525.37 = 663.32 : x
2. Step 2: Convert to fraction form
   1,105.58/1,525.37 = 663.32/x
3. Step 3: Cross multiply
   1,105.58x = 1,525.37 × 663.32
4. Step 4: Simplify right side
   1,105.58x = 1,011,797.48
5. Step 5: Solve for x
   x = 1,011,797.48/1,105.58
6. Step 6: Final answer
   x = 915.18