Finding the Fourth Proportional to 8,406.05, 12,613.98 and 3,407.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,406.05 : 12,613.98 = 3,407.39 : x
2. Step 2: Convert to fraction form
   8,406.05/12,613.98 = 3,407.39/x
3. Step 3: Cross multiply
   8,406.05x = 12,613.98 × 3,407.39
4. Step 4: Simplify right side
   8,406.05x = 42,980,762.63
5. Step 5: Solve for x
   x = 42,980,762.63/8,406.05
6. Step 6: Final answer
   x = 5,113.07