Finding the Fourth Proportional to 8,360.20, 12,538.86 and 3,918.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,360.20 : 12,538.86 = 3,918.34 : x
2. Step 2: Convert to fraction form
   8,360.20/12,538.86 = 3,918.34/x
3. Step 3: Cross multiply
   8,360.20x = 12,538.86 × 3,918.34
4. Step 4: Simplify right side
   8,360.20x = 49,131,516.69
5. Step 5: Solve for x
   x = 49,131,516.69/8,360.20
6. Step 6: Final answer
   x = 5,876.84