Finding the Fourth Proportional to 72,928.05, 100,653.72 and 42,711.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,928.05 : 100,653.72 = 42,711.57 : x
2. Step 2: Convert to fraction form
   72,928.05/100,653.72 = 42,711.57/x
3. Step 3: Cross multiply
   72,928.05x = 100,653.72 × 42,711.57
4. Step 4: Simplify right side
   72,928.05x = 4,299,078,407.54
5. Step 5: Solve for x
   x = 4,299,078,407.54/72,928.05
6. Step 6: Final answer
   x = 58,949.59