Finding the Fourth Proportional to 1,100.88, 1,518.72 and 634.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.88 : 1,518.72 = 634.80 : x
2. Step 2: Convert to fraction form
   1,100.88/1,518.72 = 634.80/x
3. Step 3: Cross multiply
   1,100.88x = 1,518.72 × 634.80
4. Step 4: Simplify right side
   1,100.88x = 964,083.46
5. Step 5: Solve for x
   x = 964,083.46/1,100.88
6. Step 6: Final answer
   x = 875.74