Finding the Fourth Proportional to 1,109.98, 1,665.15 and 369.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.98 : 1,665.15 = 369.63 : x
2. Step 2: Convert to fraction form
   1,109.98/1,665.15 = 369.63/x
3. Step 3: Cross multiply
   1,109.98x = 1,665.15 × 369.63
4. Step 4: Simplify right side
   1,109.98x = 615,485.23
5. Step 5: Solve for x
   x = 615,485.23/1,109.98
6. Step 6: Final answer
   x = 554.50