Finding the Fourth Proportional to 1,104.34, 1,523.82 and 638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.34 : 1,523.82 = 638.50 : x
2. Step 2: Convert to fraction form
   1,104.34/1,523.82 = 638.50/x
3. Step 3: Cross multiply
   1,104.34x = 1,523.82 × 638.50
4. Step 4: Simplify right side
   1,104.34x = 972,959.07
5. Step 5: Solve for x
   x = 972,959.07/1,104.34
6. Step 6: Final answer
   x = 881.03