Finding the Fourth Proportional to 72,410.58, 108,615.20 and 19,819.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,410.58 : 108,615.20 = 19,819.98 : x
2. Step 2: Convert to fraction form
   72,410.58/108,615.20 = 19,819.98/x
3. Step 3: Cross multiply
   72,410.58x = 108,615.20 × 19,819.98
4. Step 4: Simplify right side
   72,410.58x = 2,152,750,992.60
5. Step 5: Solve for x
   x = 2,152,750,992.60/72,410.58
6. Step 6: Final answer
   x = 29,729.79