Finding the Fourth Proportional to 123,439.10, 170,342.46 and 73,138.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,439.10 : 170,342.46 = 73,138.10 : x
2. Step 2: Convert to fraction form
   123,439.10/170,342.46 = 73,138.10/x
3. Step 3: Cross multiply
   123,439.10x = 170,342.46 × 73,138.10
4. Step 4: Simplify right side
   123,439.10x = 12,458,523,022.01
5. Step 5: Solve for x
   x = 12,458,523,022.01/123,439.10
6. Step 6: Final answer
   x = 100,928.50