Finding the Fourth Proportional to 72,789.84, 109,185.98 and 20,199.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,789.84 : 109,185.98 = 20,199.38 : x
2. Step 2: Convert to fraction form
   72,789.84/109,185.98 = 20,199.38/x
3. Step 3: Cross multiply
   72,789.84x = 109,185.98 × 20,199.38
4. Step 4: Simplify right side
   72,789.84x = 2,205,488,453.77
5. Step 5: Solve for x
   x = 2,205,488,453.77/72,789.84
6. Step 6: Final answer
   x = 30,299.40