Finding the Fourth Proportional to 8,320.67, 12,477.75 and 3,388.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.67 : 12,477.75 = 3,388.53 : x
2. Step 2: Convert to fraction form
   8,320.67/12,477.75 = 3,388.53/x
3. Step 3: Cross multiply
   8,320.67x = 12,477.75 × 3,388.53
4. Step 4: Simplify right side
   8,320.67x = 42,281,264.29
5. Step 5: Solve for x
   x = 42,281,264.29/8,320.67
6. Step 6: Final answer
   x = 5,081.47