Finding the Fourth Proportional to 123,281.56, 170,074.54 and 72,268.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,281.56 : 170,074.54 = 72,268.42 : x
2. Step 2: Convert to fraction form
   123,281.56/170,074.54 = 72,268.42/x
3. Step 3: Cross multiply
   123,281.56x = 170,074.54 × 72,268.42
4. Step 4: Simplify right side
   123,281.56x = 12,291,017,865.56
5. Step 5: Solve for x
   x = 12,291,017,865.56/123,281.56
6. Step 6: Final answer
   x = 99,698.75