Finding the Fourth Proportional to 2,839.47, 4,261.65 and 1,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.47 : 4,261.65 = 1,109.31 : x
2. Step 2: Convert to fraction form
   2,839.47/4,261.65 = 1,109.31/x
3. Step 3: Cross multiply
   2,839.47x = 4,261.65 × 1,109.31
4. Step 4: Simplify right side
   2,839.47x = 4,727,490.96
5. Step 5: Solve for x
   x = 4,727,490.96/2,839.47
6. Step 6: Final answer
   x = 1,664.92