Finding the Fourth Proportional to 72,507.75, 108,749.09 and 19,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,507.75 : 108,749.09 = 19,200.50 : x
2. Step 2: Convert to fraction form
   72,507.75/108,749.09 = 19,200.50/x
3. Step 3: Cross multiply
   72,507.75x = 108,749.09 × 19,200.50
4. Step 4: Simplify right side
   72,507.75x = 2,088,036,262.80
5. Step 5: Solve for x
   x = 2,088,036,262.80/72,507.75
6. Step 6: Final answer
   x = 28,797.42