Finding the Fourth Proportional to 72,939.86, 109,452.84 and 30,817.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,939.86 : 109,452.84 = 30,817.21 : x
2. Step 2: Convert to fraction form
   72,939.86/109,452.84 = 30,817.21/x
3. Step 3: Cross multiply
   72,939.86x = 109,452.84 × 30,817.21
4. Step 4: Simplify right side
   72,939.86x = 3,373,030,454.03
5. Step 5: Solve for x
   x = 3,373,030,454.03/72,939.86
6. Step 6: Final answer
   x = 46,243.99