Finding the Fourth Proportional to 1,105.78, 1,525.99 and 633.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.78 : 1,525.99 = 633.69 : x
2. Step 2: Convert to fraction form
   1,105.78/1,525.99 = 633.69/x
3. Step 3: Cross multiply
   1,105.78x = 1,525.99 × 633.69
4. Step 4: Simplify right side
   1,105.78x = 967,008.74
5. Step 5: Solve for x
   x = 967,008.74/1,105.78
6. Step 6: Final answer
   x = 874.51