Finding the Fourth Proportional to 15,978.94, 22,051.04 and 8,905.41

Step by Step Solution

1. Step 1: Write the proportion equation
   15,978.94 : 22,051.04 = 8,905.41 : x
2. Step 2: Convert to fraction form
   15,978.94/22,051.04 = 8,905.41/x
3. Step 3: Cross multiply
   15,978.94x = 22,051.04 × 8,905.41
4. Step 4: Simplify right side
   15,978.94x = 196,373,507.60
5. Step 5: Solve for x
   x = 196,373,507.60/15,978.94
6. Step 6: Final answer
   x = 12,289.52