Finding the Fourth Proportional to 13,722.72, 18,937.50 and 7,435.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,722.72 : 18,937.50 = 7,435.32 : x
2. Step 2: Convert to fraction form
   13,722.72/18,937.50 = 7,435.32/x
3. Step 3: Cross multiply
   13,722.72x = 18,937.50 × 7,435.32
4. Step 4: Simplify right side
   13,722.72x = 140,806,372.50
5. Step 5: Solve for x
   x = 140,806,372.50/13,722.72
6. Step 6: Final answer
   x = 10,260.82