Finding the Fourth Proportional to 5,513.56, 8,259.48 and 3,428.68

Step by Step Solution

1. Step 1: Write the proportion equation
   5,513.56 : 8,259.48 = 3,428.68 : x
2. Step 2: Convert to fraction form
   5,513.56/8,259.48 = 3,428.68/x
3. Step 3: Cross multiply
   5,513.56x = 8,259.48 × 3,428.68
4. Step 4: Simplify right side
   5,513.56x = 28,319,113.89
5. Step 5: Solve for x
   x = 28,319,113.89/5,513.56
6. Step 6: Final answer
   x = 5,136.27