Finding the Fourth Proportional to 123,268.47, 170,056.46 and 72,255.34

Step by Step Solution

1. Step 1: Write the proportion equation
   123,268.47 : 170,056.46 = 72,255.34 : x
2. Step 2: Convert to fraction form
   123,268.47/170,056.46 = 72,255.34/x
3. Step 3: Cross multiply
   123,268.47x = 170,056.46 × 72,255.34
4. Step 4: Simplify right side
   123,268.47x = 12,287,487,336.50
5. Step 5: Solve for x
   x = 12,287,487,336.50/123,268.47
6. Step 6: Final answer
   x = 99,680.70