Finding the Fourth Proportional to 8,140.10, 12,209.94 and 3,458.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,140.10 : 12,209.94 = 3,458.84 : x
2. Step 2: Convert to fraction form
   8,140.10/12,209.94 = 3,458.84/x
3. Step 3: Cross multiply
   8,140.10x = 12,209.94 × 3,458.84
4. Step 4: Simplify right side
   8,140.10x = 42,232,167.82
5. Step 5: Solve for x
   x = 42,232,167.82/8,140.10
6. Step 6: Final answer
   x = 5,188.17