Finding the Fourth Proportional to 72,738.52, 109,107.38 and 18,703.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,738.52 : 109,107.38 = 18,703.12 : x
2. Step 2: Convert to fraction form
   72,738.52/109,107.38 = 18,703.12/x
3. Step 3: Cross multiply
   72,738.52x = 109,107.38 × 18,703.12
4. Step 4: Simplify right side
   72,738.52x = 2,040,648,421.03
5. Step 5: Solve for x
   x = 2,040,648,421.03/72,738.52
6. Step 6: Final answer
   x = 28,054.58