Finding the Fourth Proportional to 72,519.50, 108,667.95 and 30,376.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,519.50 : 108,667.95 = 30,376.50 : x
2. Step 2: Convert to fraction form
   72,519.50/108,667.95 = 30,376.50/x
3. Step 3: Cross multiply
   72,519.50x = 108,667.95 × 30,376.50
4. Step 4: Simplify right side
   72,519.50x = 3,300,951,983.18
5. Step 5: Solve for x
   x = 3,300,951,983.18/72,519.50
6. Step 6: Final answer
   x = 45,518.13