Finding the Fourth Proportional to 28,516.86, 42,774.57 and 7,739.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,516.86 : 42,774.57 = 7,739.82 : x
2. Step 2: Convert to fraction form
   28,516.86/42,774.57 = 7,739.82/x
3. Step 3: Cross multiply
   28,516.86x = 42,774.57 × 7,739.82
4. Step 4: Simplify right side
   28,516.86x = 331,067,472.38
5. Step 5: Solve for x
   x = 331,067,472.38/28,516.86
6. Step 6: Final answer
   x = 11,609.53