Finding the Fourth Proportional to 1,109.33, 1,663.56 and 368.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.33 : 1,663.56 = 368.70 : x
2. Step 2: Convert to fraction form
   1,109.33/1,663.56 = 368.70/x
3. Step 3: Cross multiply
   1,109.33x = 1,663.56 × 368.70
4. Step 4: Simplify right side
   1,109.33x = 613,352.73
5. Step 5: Solve for x
   x = 613,352.73/1,109.33
6. Step 6: Final answer
   x = 552.91