Finding the Fourth Proportional to 20,892.88, 31,348.42 and 7,741.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,892.88 : 31,348.42 = 7,741.72 : x
2. Step 2: Convert to fraction form
   20,892.88/31,348.42 = 7,741.72/x
3. Step 3: Cross multiply
   20,892.88x = 31,348.42 × 7,741.72
4. Step 4: Simplify right side
   20,892.88x = 242,690,690.08
5. Step 5: Solve for x
   x = 242,690,690.08/20,892.88
6. Step 6: Final answer
   x = 11,615.95