Finding the Fourth Proportional to 1,105.32, 1,523.72 and 790.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.32 : 1,523.72 = 790.02 : x
2. Step 2: Convert to fraction form
   1,105.32/1,523.72 = 790.02/x
3. Step 3: Cross multiply
   1,105.32x = 1,523.72 × 790.02
4. Step 4: Simplify right side
   1,105.32x = 1,203,769.27
5. Step 5: Solve for x
   x = 1,203,769.27/1,105.32
6. Step 6: Final answer
   x = 1,089.07