Finding the Fourth Proportional to 72,940.06, 109,329.90 and 28,558.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,940.06 : 109,329.90 = 28,558.54 : x
2. Step 2: Convert to fraction form
   72,940.06/109,329.90 = 28,558.54/x
3. Step 3: Cross multiply
   72,940.06x = 109,329.90 × 28,558.54
4. Step 4: Simplify right side
   72,940.06x = 3,122,302,322.35
5. Step 5: Solve for x
   x = 3,122,302,322.35/72,940.06
6. Step 6: Final answer
   x = 42,806.41