Finding the Fourth Proportional to 123,315.14, 170,178.30 and 74,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,315.14 : 170,178.30 = 74,900.72 : x
2. Step 2: Convert to fraction form
   123,315.14/170,178.30 = 74,900.72/x
3. Step 3: Cross multiply
   123,315.14x = 170,178.30 × 74,900.72
4. Step 4: Simplify right side
   123,315.14x = 12,746,477,198.38
5. Step 5: Solve for x
   x = 12,746,477,198.38/123,315.14
6. Step 6: Final answer
   x = 103,365.06