Finding the Fourth Proportional to 12,820.56, 19,231.11 and 4,057.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.56 : 19,231.11 = 4,057.98 : x
2. Step 2: Convert to fraction form
   12,820.56/19,231.11 = 4,057.98/x
3. Step 3: Cross multiply
   12,820.56x = 19,231.11 × 4,057.98
4. Step 4: Simplify right side
   12,820.56x = 78,039,459.76
5. Step 5: Solve for x
   x = 78,039,459.76/12,820.56
6. Step 6: Final answer
   x = 6,087.06