Finding the Fourth Proportional to 300,688.76, 451,059.78 and 79,072.76

Step by Step Solution

1. Step 1: Write the proportion equation
   300,688.76 : 451,059.78 = 79,072.76 : x
2. Step 2: Convert to fraction form
   300,688.76/451,059.78 = 79,072.76/x
3. Step 3: Cross multiply
   300,688.76x = 451,059.78 × 79,072.76
4. Step 4: Simplify right side
   300,688.76x = 35,666,541,729.59
5. Step 5: Solve for x
   x = 35,666,541,729.59/300,688.76
6. Step 6: Final answer
   x = 118,616.15