Finding the Fourth Proportional to 12,309.30, 18,459.63 and 3,541.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.30 : 18,459.63 = 3,541.86 : x
2. Step 2: Convert to fraction form
   12,309.30/18,459.63 = 3,541.86/x
3. Step 3: Cross multiply
   12,309.30x = 18,459.63 × 3,541.86
4. Step 4: Simplify right side
   12,309.30x = 65,381,425.11
5. Step 5: Solve for x
   x = 65,381,425.11/12,309.30
6. Step 6: Final answer
   x = 5,311.55