Finding the Fourth Proportional to 109,078.27, 150,539.39 and 66,665.05

Step by Step Solution

1. Step 1: Write the proportion equation
   109,078.27 : 150,539.39 = 66,665.05 : x
2. Step 2: Convert to fraction form
   109,078.27/150,539.39 = 66,665.05/x
3. Step 3: Cross multiply
   109,078.27x = 150,539.39 × 66,665.05
4. Step 4: Simplify right side
   109,078.27x = 10,035,715,961.32
5. Step 5: Solve for x
   x = 10,035,715,961.32/109,078.27
6. Step 6: Final answer
   x = 92,004.72