Finding the Fourth Proportional to 1,109.94, 1,665.22 and 379.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.94 : 1,665.22 = 379.58 : x
2. Step 2: Convert to fraction form
   1,109.94/1,665.22 = 379.58/x
3. Step 3: Cross multiply
   1,109.94x = 1,665.22 × 379.58
4. Step 4: Simplify right side
   1,109.94x = 632,084.21
5. Step 5: Solve for x
   x = 632,084.21/1,109.94
6. Step 6: Final answer
   x = 569.48