Finding the Fourth Proportional to 72,500.48, 108,729.84 and 19,911.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,500.48 : 108,729.84 = 19,911.68 : x
2. Step 2: Convert to fraction form
   72,500.48/108,729.84 = 19,911.68/x
3. Step 3: Cross multiply
   72,500.48x = 108,729.84 × 19,911.68
4. Step 4: Simplify right side
   72,500.48x = 2,164,993,780.53
5. Step 5: Solve for x
   x = 2,164,993,780.53/72,500.48
6. Step 6: Final answer
   x = 29,861.79