Finding the Fourth Proportional to 109,434.72, 150,994.20 and 66,413.25

Step by Step Solution

1. Step 1: Write the proportion equation
   109,434.72 : 150,994.20 = 66,413.25 : x
2. Step 2: Convert to fraction form
   109,434.72/150,994.20 = 66,413.25/x
3. Step 3: Cross multiply
   109,434.72x = 150,994.20 × 66,413.25
4. Step 4: Simplify right side
   109,434.72x = 10,028,015,553.15
5. Step 5: Solve for x
   x = 10,028,015,553.15/109,434.72
6. Step 6: Final answer
   x = 91,634.68