Finding the Fourth Proportional to 12,453.72, 18,680.55 and 3,687.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,453.72 : 18,680.55 = 3,687.93 : x
2. Step 2: Convert to fraction form
   12,453.72/18,680.55 = 3,687.93/x
3. Step 3: Cross multiply
   12,453.72x = 18,680.55 × 3,687.93
4. Step 4: Simplify right side
   12,453.72x = 68,892,560.76
5. Step 5: Solve for x
   x = 68,892,560.76/12,453.72
6. Step 6: Final answer
   x = 5,531.89