Finding the Fourth Proportional to 14,645.72, 20,211.06 and 7,931.35

Step by Step Solution

1. Step 1: Write the proportion equation
   14,645.72 : 20,211.06 = 7,931.35 : x
2. Step 2: Convert to fraction form
   14,645.72/20,211.06 = 7,931.35/x
3. Step 3: Cross multiply
   14,645.72x = 20,211.06 × 7,931.35
4. Step 4: Simplify right side
   14,645.72x = 160,300,910.46
5. Step 5: Solve for x
   x = 160,300,910.46/14,645.72
6. Step 6: Final answer
   x = 10,945.24