Finding the Fourth Proportional to 123,035.20, 169,812.12 and 72,059.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,035.20 : 169,812.12 = 72,059.20 : x
2. Step 2: Convert to fraction form
   123,035.20/169,812.12 = 72,059.20/x
3. Step 3: Cross multiply
   123,035.20x = 169,812.12 × 72,059.20
4. Step 4: Simplify right side
   123,035.20x = 12,236,525,517.50
5. Step 5: Solve for x
   x = 12,236,525,517.50/123,035.20
6. Step 6: Final answer
   x = 99,455.49