Finding the Fourth Proportional to 72,856.24, 109,219.52 and 28,472.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,856.24 : 109,219.52 = 28,472.89 : x
2. Step 2: Convert to fraction form
   72,856.24/109,219.52 = 28,472.89/x
3. Step 3: Cross multiply
   72,856.24x = 109,219.52 × 28,472.89
4. Step 4: Simplify right side
   72,856.24x = 3,109,795,378.81
5. Step 5: Solve for x
   x = 3,109,795,378.81/72,856.24
6. Step 6: Final answer
   x = 42,683.99