Finding the Fourth Proportional to 13,141.69, 18,134.90 and 7,475.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.69 : 18,134.90 = 7,475.91 : x
2. Step 2: Convert to fraction form
   13,141.69/18,134.90 = 7,475.91/x
3. Step 3: Cross multiply
   13,141.69x = 18,134.90 × 7,475.91
4. Step 4: Simplify right side
   13,141.69x = 135,574,800.67
5. Step 5: Solve for x
   x = 135,574,800.67/13,141.69
6. Step 6: Final answer
   x = 10,316.39