Finding the Fourth Proportional to 72,939.06, 109,328.40 and 28,557.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,939.06 : 109,328.40 = 28,557.54 : x
2. Step 2: Convert to fraction form
   72,939.06/109,328.40 = 28,557.54/x
3. Step 3: Cross multiply
   72,939.06x = 109,328.40 × 28,557.54
4. Step 4: Simplify right side
   72,939.06x = 3,122,150,156.14
5. Step 5: Solve for x
   x = 3,122,150,156.14/72,939.06
6. Step 6: Final answer
   x = 42,804.91