Finding the Fourth Proportional to 12,453.56, 18,589.18 and 10,977.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,453.56 : 18,589.18 = 10,977.38 : x
2. Step 2: Convert to fraction form
   12,453.56/18,589.18 = 10,977.38/x
3. Step 3: Cross multiply
   12,453.56x = 18,589.18 × 10,977.38
4. Step 4: Simplify right side
   12,453.56x = 204,060,492.75
5. Step 5: Solve for x
   x = 204,060,492.75/12,453.56
6. Step 6: Final answer
   x = 16,385.72