Finding the Fourth Proportional to 1,187.55, 1,636.20 and 793.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187.55 : 1,636.20 = 793.89 : x
2. Step 2: Convert to fraction form
   1,187.55/1,636.20 = 793.89/x
3. Step 3: Cross multiply
   1,187.55x = 1,636.20 × 793.89
4. Step 4: Simplify right side
   1,187.55x = 1,298,962.82
5. Step 5: Solve for x
   x = 1,298,962.82/1,187.55
6. Step 6: Final answer
   x = 1,093.82