Finding the Fourth Proportional to 1,100.39, 1,518.49 and 634.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.39 : 1,518.49 = 634.79 : x
2. Step 2: Convert to fraction form
   1,100.39/1,518.49 = 634.79/x
3. Step 3: Cross multiply
   1,100.39x = 1,518.49 × 634.79
4. Step 4: Simplify right side
   1,100.39x = 963,922.27
5. Step 5: Solve for x
   x = 963,922.27/1,100.39
6. Step 6: Final answer
   x = 875.98