Finding the Fourth Proportional to 13,710.94, 18,921.12 and 7,423.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,710.94 : 18,921.12 = 7,423.31 : x
2. Step 2: Convert to fraction form
   13,710.94/18,921.12 = 7,423.31/x
3. Step 3: Cross multiply
   13,710.94x = 18,921.12 × 7,423.31
4. Step 4: Simplify right side
   13,710.94x = 140,457,339.31
5. Step 5: Solve for x
   x = 140,457,339.31/13,710.94
6. Step 6: Final answer
   x = 10,244.18