Finding the Fourth Proportional to 72,946.91, 109,376.55 and 28,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,946.91 : 109,376.55 = 28,520.72 : x
2. Step 2: Convert to fraction form
   72,946.91/109,376.55 = 28,520.72/x
3. Step 3: Cross multiply
   72,946.91x = 109,376.55 × 28,520.72
4. Step 4: Simplify right side
   72,946.91x = 3,119,498,230.56
5. Step 5: Solve for x
   x = 3,119,498,230.56/72,946.91
6. Step 6: Final answer
   x = 42,763.96