Finding the Fourth Proportional to 280,496.72, 420,753.59 and 109,711.62

Step by Step Solution

1. Step 1: Write the proportion equation
   280,496.72 : 420,753.59 = 109,711.62 : x
2. Step 2: Convert to fraction form
   280,496.72/420,753.59 = 109,711.62/x
3. Step 3: Cross multiply
   280,496.72x = 420,753.59 × 109,711.62
4. Step 4: Simplify right side
   280,496.72x = 46,161,557,979.72
5. Step 5: Solve for x
   x = 46,161,557,979.72/280,496.72
6. Step 6: Final answer
   x = 164,570.76