Finding the Fourth Proportional to 79,981.56, 119,978.72 and 27,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,981.56 : 119,978.72 = 27,391.50 : x
2. Step 2: Convert to fraction form
   79,981.56/119,978.72 = 27,391.50/x
3. Step 3: Cross multiply
   79,981.56x = 119,978.72 × 27,391.50
4. Step 4: Simplify right side
   79,981.56x = 3,286,397,074.64
5. Step 5: Solve for x
   x = 3,286,397,074.64/79,981.56
6. Step 6: Final answer
   x = 41,089.43