Finding the Fourth Proportional to 123,317.94, 170,179.55 and 72,320.28

Step by Step Solution

1. Step 1: Write the proportion equation
   123,317.94 : 170,179.55 = 72,320.28 : x
2. Step 2: Convert to fraction form
   123,317.94/170,179.55 = 72,320.28/x
3. Step 3: Cross multiply
   123,317.94x = 170,179.55 × 72,320.28
4. Step 4: Simplify right side
   123,317.94x = 12,307,431,977.70
5. Step 5: Solve for x
   x = 12,307,431,977.70/123,317.94
6. Step 6: Final answer
   x = 99,802.44