Finding the Fourth Proportional to 72,899.73, 109,329.98 and 30,780.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,899.73 : 109,329.98 = 30,780.09 : x
2. Step 2: Convert to fraction form
   72,899.73/109,329.98 = 30,780.09/x
3. Step 3: Cross multiply
   72,899.73x = 109,329.98 × 30,780.09
4. Step 4: Simplify right side
   72,899.73x = 3,365,186,470.20
5. Step 5: Solve for x
   x = 3,365,186,470.20/72,899.73
6. Step 6: Final answer
   x = 46,161.85