Finding the Fourth Proportional to 123,061.92, 169,867.64 and 72,091

Step by Step Solution

1. Step 1: Write the proportion equation
   123,061.92 : 169,867.64 = 72,091 : x
2. Step 2: Convert to fraction form
   123,061.92/169,867.64 = 72,091/x
3. Step 3: Cross multiply
   123,061.92x = 169,867.64 × 72,091
4. Step 4: Simplify right side
   123,061.92x = 12,245,928,035.24
5. Step 5: Solve for x
   x = 12,245,928,035.24/123,061.92
6. Step 6: Final answer
   x = 99,510.30