Finding the Fourth Proportional to 1,105.43, 1,525.10 and 663.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.43 : 1,525.10 = 663.17 : x
2. Step 2: Convert to fraction form
   1,105.43/1,525.10 = 663.17/x
3. Step 3: Cross multiply
   1,105.43x = 1,525.10 × 663.17
4. Step 4: Simplify right side
   1,105.43x = 1,011,389.63
5. Step 5: Solve for x
   x = 1,011,389.63/1,105.43
6. Step 6: Final answer
   x = 914.93