Finding the Fourth Proportional to 13,722.22, 18,936.69 and 7,434.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,722.22 : 18,936.69 = 7,434.59 : x
2. Step 2: Convert to fraction form
   13,722.22/18,936.69 = 7,434.59/x
3. Step 3: Cross multiply
   13,722.22x = 18,936.69 × 7,434.59
4. Step 4: Simplify right side
   13,722.22x = 140,786,526.11
5. Step 5: Solve for x
   x = 140,786,526.11/13,722.22
6. Step 6: Final answer
   x = 10,259.75