Finding the Fourth Proportional to 1,101.31, 1,519.82 and 635.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.31 : 1,519.82 = 635.56 : x
2. Step 2: Convert to fraction form
   1,101.31/1,519.82 = 635.56/x
3. Step 3: Cross multiply
   1,101.31x = 1,519.82 × 635.56
4. Step 4: Simplify right side
   1,101.31x = 965,936.80
5. Step 5: Solve for x
   x = 965,936.80/1,101.31
6. Step 6: Final answer
   x = 877.08