Finding the Fourth Proportional to 1,109.04, 1,663.83 and 928.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.04 : 1,663.83 = 928.01 : x
2. Step 2: Convert to fraction form
   1,109.04/1,663.83 = 928.01/x
3. Step 3: Cross multiply
   1,109.04x = 1,663.83 × 928.01
4. Step 4: Simplify right side
   1,109.04x = 1,544,042.56
5. Step 5: Solve for x
   x = 1,544,042.56/1,109.04
6. Step 6: Final answer
   x = 1,392.23