Finding the Fourth Proportional to 123,465.20, 170,380.73 and 72,468.88

Step by Step Solution

1. Step 1: Write the proportion equation
   123,465.20 : 170,380.73 = 72,468.88 : x
2. Step 2: Convert to fraction form
   123,465.20/170,380.73 = 72,468.88/x
3. Step 3: Cross multiply
   123,465.20x = 170,380.73 × 72,468.88
4. Step 4: Simplify right side
   123,465.20x = 12,347,300,431.90
5. Step 5: Solve for x
   x = 12,347,300,431.90/123,465.20
6. Step 6: Final answer
   x = 100,006.33