Finding the Fourth Proportional to 123,713.39, 170,715.89 and 72,728.27

Step by Step Solution

1. Step 1: Write the proportion equation
   123,713.39 : 170,715.89 = 72,728.27 : x
2. Step 2: Convert to fraction form
   123,713.39/170,715.89 = 72,728.27/x
3. Step 3: Cross multiply
   123,713.39x = 170,715.89 × 72,728.27
4. Step 4: Simplify right side
   123,713.39x = 12,415,870,123.99
5. Step 5: Solve for x
   x = 12,415,870,123.99/123,713.39
6. Step 6: Final answer
   x = 100,359.96