Finding the Fourth Proportional to 123,328.64, 170,194.37 and 72,371.54

Step by Step Solution

1. Step 1: Write the proportion equation
   123,328.64 : 170,194.37 = 72,371.54 : x
2. Step 2: Convert to fraction form
   123,328.64/170,194.37 = 72,371.54/x
3. Step 3: Cross multiply
   123,328.64x = 170,194.37 × 72,371.54
4. Step 4: Simplify right side
   123,328.64x = 12,317,228,719.86
5. Step 5: Solve for x
   x = 12,317,228,719.86/123,328.64
6. Step 6: Final answer
   x = 99,873.22