Finding the Fourth Proportional to 19,155.48, 28,721.37 and 8,056.45

Step by Step Solution

1. Step 1: Write the proportion equation
   19,155.48 : 28,721.37 = 8,056.45 : x
2. Step 2: Convert to fraction form
   19,155.48/28,721.37 = 8,056.45/x
3. Step 3: Cross multiply
   19,155.48x = 28,721.37 × 8,056.45
4. Step 4: Simplify right side
   19,155.48x = 231,392,281.34
5. Step 5: Solve for x
   x = 231,392,281.34/19,155.48
6. Step 6: Final answer
   x = 12,079.69