Finding the Fourth Proportional to 13,710.79, 18,920.91 and 7,423.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,710.79 : 18,920.91 = 7,423.17 : x
2. Step 2: Convert to fraction form
   13,710.79/18,920.91 = 7,423.17/x
3. Step 3: Cross multiply
   13,710.79x = 18,920.91 × 7,423.17
4. Step 4: Simplify right side
   13,710.79x = 140,453,131.48
5. Step 5: Solve for x
   x = 140,453,131.48/13,710.79
6. Step 6: Final answer
   x = 10,243.99