Finding the Fourth Proportional to 8,406.59, 12,607.60 and 3,475.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,406.59 : 12,607.60 = 3,475.05 : x
2. Step 2: Convert to fraction form
   8,406.59/12,607.60 = 3,475.05/x
3. Step 3: Cross multiply
   8,406.59x = 12,607.60 × 3,475.05
4. Step 4: Simplify right side
   8,406.59x = 43,812,061.85
5. Step 5: Solve for x
   x = 43,812,061.85/8,406.59
6. Step 6: Final answer
   x = 5,211.64