Finding the Fourth Proportional to 12,861.56, 19,293 and 3,628.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,861.56 : 19,293 = 3,628.28 : x
2. Step 2: Convert to fraction form
   12,861.56/19,293 = 3,628.28/x
3. Step 3: Cross multiply
   12,861.56x = 19,293 × 3,628.28
4. Step 4: Simplify right side
   12,861.56x = 70,000,406.04
5. Step 5: Solve for x
   x = 70,000,406.04/12,861.56
6. Step 6: Final answer
   x = 5,442.61