Finding the Fourth Proportional to 71,856.48, 107,758.78 and 30,306.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,856.48 : 107,758.78 = 30,306.72 : x
2. Step 2: Convert to fraction form
   71,856.48/107,758.78 = 30,306.72/x
3. Step 3: Cross multiply
   71,856.48x = 107,758.78 × 30,306.72
4. Step 4: Simplify right side
   71,856.48x = 3,265,815,173.00
5. Step 5: Solve for x
   x = 3,265,815,173.00/71,856.48
6. Step 6: Final answer
   x = 45,449.14