Finding the Fourth Proportional to 72,682.79, 109,055.16 and 28,340.73

Step by Step Solution

1. Step 1: Write the proportion equation
   72,682.79 : 109,055.16 = 28,340.73 : x
2. Step 2: Convert to fraction form
   72,682.79/109,055.16 = 28,340.73/x
3. Step 3: Cross multiply
   72,682.79x = 109,055.16 × 28,340.73
4. Step 4: Simplify right side
   72,682.79x = 3,090,702,844.67
5. Step 5: Solve for x
   x = 3,090,702,844.67/72,682.79
6. Step 6: Final answer
   x = 42,523.18