Finding the Fourth Proportional to 8,327.48, 12,492.72 and 2,780.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,327.48 : 12,492.72 = 2,780.28 : x
2. Step 2: Convert to fraction form
   8,327.48/12,492.72 = 2,780.28/x
3. Step 3: Cross multiply
   8,327.48x = 12,492.72 × 2,780.28
4. Step 4: Simplify right side
   8,327.48x = 34,733,259.56
5. Step 5: Solve for x
   x = 34,733,259.56/8,327.48
6. Step 6: Final answer
   x = 4,170.92