Finding the Fourth Proportional to 300,983.62, 415,399.71 and 186,299.05

Step by Step Solution

1. Step 1: Write the proportion equation
   300,983.62 : 415,399.71 = 186,299.05 : x
2. Step 2: Convert to fraction form
   300,983.62/415,399.71 = 186,299.05/x
3. Step 3: Cross multiply
   300,983.62x = 415,399.71 × 186,299.05
4. Step 4: Simplify right side
   300,983.62x = 77,388,571,343.28
5. Step 5: Solve for x
   x = 77,388,571,343.28/300,983.62
6. Step 6: Final answer
   x = 257,118.88