Finding the Fourth Proportional to 72,459.12, 108,687.44 and 19,868.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,459.12 : 108,687.44 = 19,868.56 : x
2. Step 2: Convert to fraction form
   72,459.12/108,687.44 = 19,868.56/x
3. Step 3: Cross multiply
   72,459.12x = 108,687.44 × 19,868.56
4. Step 4: Simplify right side
   72,459.12x = 2,159,462,922.89
5. Step 5: Solve for x
   x = 2,159,462,922.89/72,459.12
6. Step 6: Final answer
   x = 29,802.50