Finding the Fourth Proportional to 280,196.47, 386,655.28 and 159,367.15

Step by Step Solution

1. Step 1: Write the proportion equation
   280,196.47 : 386,655.28 = 159,367.15 : x
2. Step 2: Convert to fraction form
   280,196.47/386,655.28 = 159,367.15/x
3. Step 3: Cross multiply
   280,196.47x = 386,655.28 × 159,367.15
4. Step 4: Simplify right side
   280,196.47x = 61,620,150,006.05
5. Step 5: Solve for x
   x = 61,620,150,006.05/280,196.47
6. Step 6: Final answer
   x = 219,917.65