Finding the Fourth Proportional to 123,154.38, 169,954.94 and 72,154.91

Step by Step Solution

1. Step 1: Write the proportion equation
   123,154.38 : 169,954.94 = 72,154.91 : x
2. Step 2: Convert to fraction form
   123,154.38/169,954.94 = 72,154.91/x
3. Step 3: Cross multiply
   123,154.38x = 169,954.94 × 72,154.91
4. Step 4: Simplify right side
   123,154.38x = 12,263,083,038.98
5. Step 5: Solve for x
   x = 12,263,083,038.98/123,154.38
6. Step 6: Final answer
   x = 99,574.88