Finding the Fourth Proportional to 1,100.08, 1,647.96 and 842.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.08 : 1,647.96 = 842.32 : x
2. Step 2: Convert to fraction form
   1,100.08/1,647.96 = 842.32/x
3. Step 3: Cross multiply
   1,100.08x = 1,647.96 × 842.32
4. Step 4: Simplify right side
   1,100.08x = 1,388,109.67
5. Step 5: Solve for x
   x = 1,388,109.67/1,100.08
6. Step 6: Final answer
   x = 1,261.83