Finding the Fourth Proportional to 12,624.50, 18,947.01 and 10,787.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,624.50 : 18,947.01 = 10,787.42 : x
2. Step 2: Convert to fraction form
   12,624.50/18,947.01 = 10,787.42/x
3. Step 3: Cross multiply
   12,624.50x = 18,947.01 × 10,787.42
4. Step 4: Simplify right side
   12,624.50x = 204,389,354.61
5. Step 5: Solve for x
   x = 204,389,354.61/12,624.50
6. Step 6: Final answer
   x = 16,189.90