Finding the Fourth Proportional to 13,710.67, 18,920.64 and 7,423

Step by Step Solution

1. Step 1: Write the proportion equation
   13,710.67 : 18,920.64 = 7,423 : x
2. Step 2: Convert to fraction form
   13,710.67/18,920.64 = 7,423/x
3. Step 3: Cross multiply
   13,710.67x = 18,920.64 × 7,423
4. Step 4: Simplify right side
   13,710.67x = 140,447,910.72
5. Step 5: Solve for x
   x = 140,447,910.72/13,710.67
6. Step 6: Final answer
   x = 10,243.69