Finding the Fourth Proportional to 72,493.92, 108,736.02 and 19,899

Step by Step Solution

1. Step 1: Write the proportion equation
   72,493.92 : 108,736.02 = 19,899 : x
2. Step 2: Convert to fraction form
   72,493.92/108,736.02 = 19,899/x
3. Step 3: Cross multiply
   72,493.92x = 108,736.02 × 19,899
4. Step 4: Simplify right side
   72,493.92x = 2,163,738,061.98
5. Step 5: Solve for x
   x = 2,163,738,061.98/72,493.92
6. Step 6: Final answer
   x = 29,847.17