Finding the Fourth Proportional to 280,404.09, 386,946.72 and 153,080.73

Step by Step Solution

1. Step 1: Write the proportion equation
   280,404.09 : 386,946.72 = 153,080.73 : x
2. Step 2: Convert to fraction form
   280,404.09/386,946.72 = 153,080.73/x
3. Step 3: Cross multiply
   280,404.09x = 386,946.72 × 153,080.73
4. Step 4: Simplify right side
   280,404.09x = 59,234,086,368.71
5. Step 5: Solve for x
   x = 59,234,086,368.71/280,404.09
6. Step 6: Final answer
   x = 211,245.44