Finding the Fourth Proportional to 72,478.72, 99,928.02 and 46,939.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,478.72 : 99,928.02 = 46,939.96 : x
2. Step 2: Convert to fraction form
   72,478.72/99,928.02 = 46,939.96/x
3. Step 3: Cross multiply
   72,478.72x = 99,928.02 × 46,939.96
4. Step 4: Simplify right side
   72,478.72x = 4,690,617,261.68
5. Step 5: Solve for x
   x = 4,690,617,261.68/72,478.72
6. Step 6: Final answer
   x = 64,717.16