Finding the Fourth Proportional to 8,331.56, 12,496.18 and 2,784.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,331.56 : 12,496.18 = 2,784.78 : x
2. Step 2: Convert to fraction form
   8,331.56/12,496.18 = 2,784.78/x
3. Step 3: Cross multiply
   8,331.56x = 12,496.18 × 2,784.78
4. Step 4: Simplify right side
   8,331.56x = 34,799,112.14
5. Step 5: Solve for x
   x = 34,799,112.14/8,331.56
6. Step 6: Final answer
   x = 4,176.78