Finding the Fourth Proportional to 1,100.72, 1,518.56 and 634.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.72 : 1,518.56 = 634.88 : x
2. Step 2: Convert to fraction form
   1,100.72/1,518.56 = 634.88/x
3. Step 3: Cross multiply
   1,100.72x = 1,518.56 × 634.88
4. Step 4: Simplify right side
   1,100.72x = 964,103.37
5. Step 5: Solve for x
   x = 964,103.37/1,100.72
6. Step 6: Final answer
   x = 875.88