Finding the Fourth Proportional to 123,155.51, 169,956.49 and 72,156.04

Step by Step Solution

1. Step 1: Write the proportion equation
   123,155.51 : 169,956.49 = 72,156.04 : x
2. Step 2: Convert to fraction form
   123,155.51/169,956.49 = 72,156.04/x
3. Step 3: Cross multiply
   123,155.51x = 169,956.49 × 72,156.04
4. Step 4: Simplify right side
   123,155.51x = 12,263,387,290.70
5. Step 5: Solve for x
   x = 12,263,387,290.70/123,155.51
6. Step 6: Final answer
   x = 99,576.44