Finding the Fourth Proportional to 8,320.82, 12,483.59 and 2,777.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.82 : 12,483.59 = 2,777.79 : x
2. Step 2: Convert to fraction form
   8,320.82/12,483.59 = 2,777.79/x
3. Step 3: Cross multiply
   8,320.82x = 12,483.59 × 2,777.79
4. Step 4: Simplify right side
   8,320.82x = 34,676,798.41
5. Step 5: Solve for x
   x = 34,676,798.41/8,320.82
6. Step 6: Final answer
   x = 4,167.48