Finding the Fourth Proportional to 8,425.86, 11,620.83 and 7,415.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,425.86 : 11,620.83 = 7,415.38 : x
2. Step 2: Convert to fraction form
   8,425.86/11,620.83 = 7,415.38/x
3. Step 3: Cross multiply
   8,425.86x = 11,620.83 × 7,415.38
4. Step 4: Simplify right side
   8,425.86x = 86,172,870.37
5. Step 5: Solve for x
   x = 86,172,870.37/8,425.86
6. Step 6: Final answer
   x = 10,227.19