Finding the Fourth Proportional to 72,940.86, 109,454.34 and 30,818.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,940.86 : 109,454.34 = 30,818.21 : x
2. Step 2: Convert to fraction form
   72,940.86/109,454.34 = 30,818.21/x
3. Step 3: Cross multiply
   72,940.86x = 109,454.34 × 30,818.21
4. Step 4: Simplify right side
   72,940.86x = 3,373,186,835.53
5. Step 5: Solve for x
   x = 3,373,186,835.53/72,940.86
6. Step 6: Final answer
   x = 46,245.50