Finding the Fourth Proportional to 47,168.88, 70,747.56 and 12,108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,168.88 : 70,747.56 = 12,108.72 : x
2. Step 2: Convert to fraction form
   47,168.88/70,747.56 = 12,108.72/x
3. Step 3: Cross multiply
   47,168.88x = 70,747.56 × 12,108.72
4. Step 4: Simplify right side
   47,168.88x = 856,662,394.72
5. Step 5: Solve for x
   x = 856,662,394.72/47,168.88
6. Step 6: Final answer
   x = 18,161.60