Finding the Fourth Proportional to 1,105.19, 1,526.04 and 663.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.19 : 1,526.04 = 663.69 : x
2. Step 2: Convert to fraction form
   1,105.19/1,526.04 = 663.69/x
3. Step 3: Cross multiply
   1,105.19x = 1,526.04 × 663.69
4. Step 4: Simplify right side
   1,105.19x = 1,012,823.21
5. Step 5: Solve for x
   x = 1,012,823.21/1,105.19
6. Step 6: Final answer
   x = 916.42