Finding the Fourth Proportional to 134,928.89, 186,218.27 and 78,340.27

Step by Step Solution

1. Step 1: Write the proportion equation
   134,928.89 : 186,218.27 = 78,340.27 : x
2. Step 2: Convert to fraction form
   134,928.89/186,218.27 = 78,340.27/x
3. Step 3: Cross multiply
   134,928.89x = 186,218.27 × 78,340.27
4. Step 4: Simplify right side
   134,928.89x = 14,588,388,931.88
5. Step 5: Solve for x
   x = 14,588,388,931.88/134,928.89
6. Step 6: Final answer
   x = 108,119.09