Finding the Fourth Proportional to 108,418.72, 149,635.20 and 65,969.88

Step by Step Solution

1. Step 1: Write the proportion equation
   108,418.72 : 149,635.20 = 65,969.88 : x
2. Step 2: Convert to fraction form
   108,418.72/149,635.20 = 65,969.88/x
3. Step 3: Cross multiply
   108,418.72x = 149,635.20 × 65,969.88
4. Step 4: Simplify right side
   108,418.72x = 9,871,416,187.78
5. Step 5: Solve for x
   x = 9,871,416,187.78/108,418.72
6. Step 6: Final answer
   x = 91,049.00