Finding the Fourth Proportional to 8,390.34, 12,585.93 and 3,196.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,390.34 : 12,585.93 = 3,196.62 : x
2. Step 2: Convert to fraction form
   8,390.34/12,585.93 = 3,196.62/x
3. Step 3: Cross multiply
   8,390.34x = 12,585.93 × 3,196.62
4. Step 4: Simplify right side
   8,390.34x = 40,232,435.56
5. Step 5: Solve for x
   x = 40,232,435.56/8,390.34
6. Step 6: Final answer
   x = 4,795.09