Finding the Fourth Proportional to 1,105.80, 1,526.10 and 633.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.80 : 1,526.10 = 633.72 : x
2. Step 2: Convert to fraction form
   1,105.80/1,526.10 = 633.72/x
3. Step 3: Cross multiply
   1,105.80x = 1,526.10 × 633.72
4. Step 4: Simplify right side
   1,105.80x = 967,120.09
5. Step 5: Solve for x
   x = 967,120.09/1,105.80
6. Step 6: Final answer
   x = 874.59