Finding the Fourth Proportional to 20,934.56, 31,375.12 and 9,816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,934.56 : 31,375.12 = 9,816.72 : x
2. Step 2: Convert to fraction form
   20,934.56/31,375.12 = 9,816.72/x
3. Step 3: Cross multiply
   20,934.56x = 31,375.12 × 9,816.72
4. Step 4: Simplify right side
   20,934.56x = 308,000,768.01
5. Step 5: Solve for x
   x = 308,000,768.01/20,934.56
6. Step 6: Final answer
   x = 14,712.55