Finding the Fourth Proportional to 1,105.53, 1,524.69 and 790.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.53 : 1,524.69 = 790.22 : x
2. Step 2: Convert to fraction form
   1,105.53/1,524.69 = 790.22/x
3. Step 3: Cross multiply
   1,105.53x = 1,524.69 × 790.22
4. Step 4: Simplify right side
   1,105.53x = 1,204,832.91
5. Step 5: Solve for x
   x = 1,204,832.91/1,105.53
6. Step 6: Final answer
   x = 1,089.82