Finding the Fourth Proportional to 13,722.15, 18,936.58 and 7,434.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,722.15 : 18,936.58 = 7,434.52 : x
2. Step 2: Convert to fraction form
   13,722.15/18,936.58 = 7,434.52/x
3. Step 3: Cross multiply
   13,722.15x = 18,936.58 × 7,434.52
4. Step 4: Simplify right side
   13,722.15x = 140,784,401.33
5. Step 5: Solve for x
   x = 140,784,401.33/13,722.15
6. Step 6: Final answer
   x = 10,259.65