Finding the Fourth Proportional to 13,710.72, 18,920.78 and 7,423.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,710.72 : 18,920.78 = 7,423.10 : x
2. Step 2: Convert to fraction form
   13,710.72/18,920.78 = 7,423.10/x
3. Step 3: Cross multiply
   13,710.72x = 18,920.78 × 7,423.10
4. Step 4: Simplify right side
   13,710.72x = 140,450,842.02
5. Step 5: Solve for x
   x = 140,450,842.02/13,710.72
6. Step 6: Final answer
   x = 10,243.87