Finding the Fourth Proportional to 72,105.12, 108,161.82 and 19,518.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,105.12 : 108,161.82 = 19,518.84 : x
2. Step 2: Convert to fraction form
   72,105.12/108,161.82 = 19,518.84/x
3. Step 3: Cross multiply
   72,105.12x = 108,161.82 × 19,518.84
4. Step 4: Simplify right side
   72,105.12x = 2,111,193,258.69
5. Step 5: Solve for x
   x = 2,111,193,258.69/72,105.12
6. Step 6: Final answer
   x = 29,279.38