Finding the Fourth Proportional to 72,740.72, 109,011.54 and 54,956.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,740.72 : 109,011.54 = 54,956.76 : x
2. Step 2: Convert to fraction form
   72,740.72/109,011.54 = 54,956.76/x
3. Step 3: Cross multiply
   72,740.72x = 109,011.54 × 54,956.76
4. Step 4: Simplify right side
   72,740.72x = 5,990,921,041.01
5. Step 5: Solve for x
   x = 5,990,921,041.01/72,740.72
6. Step 6: Final answer
   x = 82,359.94