Finding the Fourth Proportional to 72,757.92, 109,090.08 and 30,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,757.92 : 109,090.08 = 30,665.28 : x
2. Step 2: Convert to fraction form
   72,757.92/109,090.08 = 30,665.28/x
3. Step 3: Cross multiply
   72,757.92x = 109,090.08 × 30,665.28
4. Step 4: Simplify right side
   72,757.92x = 3,345,277,848.42
5. Step 5: Solve for x
   x = 3,345,277,848.42/72,757.92
6. Step 6: Final answer
   x = 45,978.20