Finding the Fourth Proportional to 8,320.65, 12,477.51 and 3,386.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.65 : 12,477.51 = 3,386.94 : x
2. Step 2: Convert to fraction form
   8,320.65/12,477.51 = 3,386.94/x
3. Step 3: Cross multiply
   8,320.65x = 12,477.51 × 3,386.94
4. Step 4: Simplify right side
   8,320.65x = 42,260,577.72
5. Step 5: Solve for x
   x = 42,260,577.72/8,320.65
6. Step 6: Final answer
   x = 5,079.00