Finding the Fourth Proportional to 12,402.59, 18,604.45 and 3,518.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.59 : 18,604.45 = 3,518.56 : x
2. Step 2: Convert to fraction form
   12,402.59/18,604.45 = 3,518.56/x
3. Step 3: Cross multiply
   12,402.59x = 18,604.45 × 3,518.56
4. Step 4: Simplify right side
   12,402.59x = 65,460,873.59
5. Step 5: Solve for x
   x = 65,460,873.59/12,402.59
6. Step 6: Final answer
   x = 5,278.00