Finding the Fourth Proportional to 8,139.56, 12,210.93 and 3,459.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.56 : 12,210.93 = 3,459.52 : x
2. Step 2: Convert to fraction form
   8,139.56/12,210.93 = 3,459.52/x
3. Step 3: Cross multiply
   8,139.56x = 12,210.93 × 3,459.52
4. Step 4: Simplify right side
   8,139.56x = 42,243,926.03
5. Step 5: Solve for x
   x = 42,243,926.03/8,139.56
6. Step 6: Final answer
   x = 5,189.95