Finding the Fourth Proportional to 8,307.60, 12,461.10 and 3,377.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,307.60 : 12,461.10 = 3,377.10 : x
2. Step 2: Convert to fraction form
   8,307.60/12,461.10 = 3,377.10/x
3. Step 3: Cross multiply
   8,307.60x = 12,461.10 × 3,377.10
4. Step 4: Simplify right side
   8,307.60x = 42,082,380.81
5. Step 5: Solve for x
   x = 42,082,380.81/8,307.60
6. Step 6: Final answer
   x = 5,065.53